Opening the first PDF with Preview does not cause Safari to launch, and appears to show a static Google web page. No outbound traffic was observed when opening the PDF in Preview. Opening the PDF using Acrobat 5.0, 6.0 , and 7.0 appears to cause Safari to launch and open "http://www.google.com/owned.html". It looks like Preview is not vulnerable to this particular attack, while at least some Adobe Acrobat readers for OSX are vulnerable.