title: Invalidpdfexception pdf header signature not found
body: <p>I have some code that reads <strong>pdf</strong> files. The code fails at the line :</p>
  
  <pre><code>iTextSharp.text.pdf.PRTokeniser.CheckPdfHeader() at
                                   iTextSharp.text.pdf.PdfReader.ReadPdf()
  </code></pre>
  
  <p>I know from other entries that this issue is coming from some invalid formatting in the pdf. However I'm not in a position to tell my users to redo their pdfs. Is there some other way around this issue, that can allow reading of the pdf despite this problem?</p>