Detecting source of .pdf files

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Detecting source of .pdf files

Postby raggy » Sun Mar 31, 2013 9:41 am

I got my brother-in-law to make some vector graphic maps for me, using AutoCad which he use professionally. My own computer can't read these files, so he converted them to .pdf files for me, which I can print, and from which I can leave out layers to taste.

Can anyone seeing the .pdf files, or simply the prints they produce, tell that the files were made with AutoCad in the first place?

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Re: Detecting source of .pdf files

Postby ragstian » Sun Mar 31, 2013 11:39 am


The creator tag is optional according to the PDF specification.
In most of the PDF files on my system the tag is there with creator data filled in.
I would be surprised if AutoCAD created a pdf file without the tag.

From the spec;

Code: Select all

Creator text string (Optional) If the document was converted to PDF from another format, the
name of the application (for example, Adobe FrameMaker®) that created the
original document from which it was converted.

Code: Select all

Example 9.1
1 0 obj
<< /Title (PostScript Language Reference, Third Edition)
/Author (Adobe Systems Incorporated)
/Creator (Adobe® FrameMaker® 5.5.3 for Power Macintosh)
/Producer (Acrobat® Distiller™ 3.01 for Power Macintosh)
/CreationDate (D:19970915110347-08'00')
/ModDate (D:19990209153925-08'00')

Good Luck!
( ͡° ͜ʖ ͡°)

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