Saw this on Twitter and looked up the article (from CNN Tech): iPhone, iPad users: Watch out for malicious PDF files - CNN
Go to the 4th paragraph from the end, where the author writes:
"Gizmodo suggests first using Jailbreakme to jailbreak your device. This tool is delivered via a PDF file that actually uses the security exploit to install software that allows you to jailbreak your Apple device. Then, to close this exploit, download PDF Patch. After that, you can un-jailbreak your device if you like."
That is all ... just wanted to share the funny of the day...