You can unlock your .wwf files here (up to 5 MB) or here (up to 95 MB). This one is even dedicated to .wwf files, which is hilarious!
Install Ghostscript on Windows and create this simple batchfile:
gswin32c -dSAFER -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sFONTPATH=%windir%/fonts;xfonts;. -sPDFPassword= -dPDFSETTINGS=/prepress -dPassThroughJPEGImages=true -sOutputFile="%tt%_noPW.pdf" "%1"
Save it as crackwwf.bat. Now open a DOS window and issue:
Unconfirmed, but it makes sense. Please put any corrections in the comments. For those who don't like to use the CLI, you can download my .wwf toolkit. The installation manual is here.
If you just want to print a .wwf you have to install GSview as well. Start it, load your .wwf file and simply print it.
Install Ghostscript and poppler-tools which most distributions carry. Then issue:
pdftops Presseinfo_SAVE_AS_WWF_-_SAVE_A_TREE.wwf crack.ps
ps2pdf crack.ps crack.pdf
You can also download my .wwf toolkit, which comes with a GUI. If you open it with KGhostview you can print it without any conversion at all:
The .wwf toolkit can probably be ported to OS/X as well. If you want to help, please leave a message in the comments.