iTextSharp Error: PDF Header Signature not found

In trying to print word file in PDF format I get this error below.

I have a container that shows word document data from database and a button that prints the word document inside the container but when I click on the button the word document does not print. Please I need help in making word document print.

protected void Page_Load(object sender, EventArgs e)
{
    if(!this.IsPostBack)
    {
        BindWordAndQR();
    }
}      
 
//This is where I bind the QR code to the Image1 control, which is on the web form
private void BindWordAndQR()
{
    if (Session["docx"] != null)
    {
        int id = Convert.ToInt32(Session["docx"]);
 
        string sql = "SELECT * FROM WordTable WHERE Id = @Id";
        SqlParameter[] parameters = new[] { new SqlParameter("@Id", id) };
 
        // Bind Image3 for Card Image
        DataTable dt = SelectFromDatabase(sql, parameters);
 
        byte[] QRBytes = GetQRCodeBytes(ToAbsoluteUrl("~/wordfile.aspx") + "?Id=" + Request.QueryString["Id"]);
        Image1.ImageUrl = "data:image/jpg;base64," + Convert.ToBase64String(QRBytes);
    }
}
 
public string ToAbsoluteUrl(string relativeUrl)
{
    if (string.IsNullOrEmpty(relativeUrl))
    {
        return relativeUrl;
    }
    if (relativeUrl.StartsWith("/"))
    {
        relativeUrl = relativeUrl.Insert(0, "~");
    }
 
    if (!relativeUrl.StartsWith("~/"))
    {
        relativeUrl = relativeUrl.Insert(0, "~/");
    }
 
    var url = HttpContext.Current.Request.Url;
    var port = url.Port != 80 ? (":" + url.Port) : String.Empty;
 
    return String.Format("{0}://{1}{2}{3}", url.Scheme, url.Host, port, VirtualPathUtility.ToAbsolute(relativeUrl));
}
 
//QR code is generated here
public byte[] GetQRCodeBytes(string url)
{
    QRCodeEncoder encoder = new QRCodeEncoder();
    Bitmap bi = encoder.Encode(url);
    MemoryStream tmpSteam = new MemoryStream();
    bi.Save(tmpSteam, ImageFormat.Jpeg);
    return tmpSteam.ToArray();
}
 
public static DataTable SelectFromDatabase(string sql, SqlParameter[] parameters)
{
    string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
    using (SqlConnection con = new SqlConnection(connectionString))
    {
        try
        {
            using (SqlCommand cmd = new SqlCommand(sql, con))
            {
                if (parameters != null)
                {
                    cmd.Parameters.AddRange(parameters);
                }
 
                using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                {
                    DataTable dt = new DataTable();
                    sda.Fill(dt);
                    return dt;
                }
            }
        }
        catch (SqlException ex)
        {
            string msg = "Error:";
            msg += ex.Message;
            throw new Exception(msg);
        }
    }
}
 
//This is where I display the word document file on the web form, using static object [webmethod]
[WebMethod(EnableSession = true)]
public static object GetFile()
{
    try
    {
        string fileName = string.Empty;
        byte[] bytes = null;
        string type = string.Empty;
        string connectionString = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
        using (SqlConnection con = new SqlConnection(connectionString))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT * FROM tablereceipt WHERE Id = @Id", con))
            {
                cmd.Parameters.AddWithValue("@Id", HttpContext.Current.Session["Receiptdocx"]);
                con.Open();
                using (SqlDataReader dr = cmd.ExecuteReader())
                {
                    if (dr.Read())
                    {
                        fileName = dr["Name"].ToString();
                        bytes = (byte[])dr["Data"];
                        type = dr["ContentType"].ToString();
                    }
                }
                con.Close();
            }
        }
        return new { Name = fileName, Data = Convert.ToBase64String(bytes), ContentType = type };
    }
    catch (SqlException ex)
    {
        string msg = "Error:";
        msg += ex.Message;
        throw new Exception(msg);
    }
}
 
//This is the print Section
protected void BtnPrinnt_Click(object sender, EventArgs e)
{
    if (Session["docx"] != null)
    {
        int id = Convert.ToInt32(Session["docx"]);
 
        string sql = "SELECT * FROM WordTable WHERE Id = @Id";
        SqlParameter[] parameters = new[] {
            new SqlParameter("@Id", id)
        };
 
        // Bind Image3 for Card Image
        DataTable dt = SelectFromDatabase(sql, parameters);
        if (dt.Rows.Count > 0)
        {
            byte[] QRBytes = GetQRCodeBytes(ToAbsoluteUrl("~/wordfile.aspx") + "?Id=" + Request.QueryString["Id"]);
            Image1.ImageUrl = "data:image/jpg;base64," + Convert.ToBase64String(QRBytes);
 
            iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(QRBytes);
 
            byte[] pdfbytes = (byte[])dt.Rows[0]["Data"];
 
            using (MemoryStream memoryStream = new MemoryStream())
            {
                var reader = new PdfReader(pdfbytes);
                var stamper = new PdfStamper(reader, memoryStream);
                var pdfContentByte = stamper.GetOverContent(1);
                image.ScaleAbsolute(75f, 75f);
                image.SetAbsolutePosition(reader.GetPageSize(1).Width / 2 - 100, 50);
                pdfContentByte.AddImage(image);
                stamper.Close();
                byte[] bytess = memoryStream.ToArray();
                memoryStream.Close();
 
                Response.Clear();
                Response.ContentType = "application/pdf";
                Response.AddHeader("Content-Disposition", "attachment; filename=Receipt.pdf");
                Response.ContentType = "application/pdf";
                Response.Buffer = true;
                Response.Cache.SetCacheability(HttpCacheability.NoCache);
                Response.BinaryWrite(bytess);
                Response.End();
            }
        }
    }
}
 
public override void VerifyRenderingInServerForm(Control control)
{
    /* Verifies that the control is rendered */
}