WWF file format
From hacktolive.org
Homepage: http://www.saveaswwf.com
Identification as PDF
Identification using the "file" command
Identification using the hex editor "Okteta"
Breaking the DRM
The easiest way to liberate your PDF/WWF files that have print restrictions is to:
1. Open them in a program like Evince (Available for Windows and installed by default on Ubuntu as "Document Viewer")
2. Then, from Evince, print them:
- In Windows you can use a virtual PDF printer like PDFCreator
- In Ubuntu and possibly other Linux-based system you have the option "Print to file" and then select "PDF"
3. You now have a new PDF file without printing restrictions!
Other method: http://thebeezspeaks.blogspot.com/2010/12/how-to-print-or-unlock-wwf-file.html
