Invisible signatures by the incremental update does not have any signs?

Hi all!

Sorry if here is not the right place for my question. If this is the case, is - can someone inform in the right place?

Well, I am trying to build a tool to sign a PDF of incremental update using Delphi [].

I am beginner in PDF structure and the brevity of the time made me perhaps a bit inattentive and desperate.

After 2 months of hard fighting, I managed to get Acrobat Reader know my PDF (initially created by a java tool called SignServer) has a signature and recognize the certificate but it says that the certification is not valid because 'the byte range is invalid.

I analyzed the PDF file in a hex editor and the byte range signature so any other object compensates seems correct.

My PDF test is here: https://drive.Google.com/open?ID=0B0KKmaB-a0Z4SDZfNXdZRWZEem8

Can you tell me what the problem with this PDF?

Many thanks for any help!

Specifications and PDF language

Tags: Adobe PostScript

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