If you have an iPhone, iPad or iPod Touch, you should be careful when opening up PDF files from the web. There is a vulnerability that exists in the PDF viewer that Apple built into it’s iOS. The flaw allows for code injection which could do anything from jailbreaking your device to capturing your data. Apple has not yet fixed the flaw.
The problem was made public when a jailbreak website introduced its web based jailbreak. Supposedly, you just open this site up and slide the slider. After a short time, your device is jailbroken.
Jailbreaking your iDevice, while legal, opens up a pandora’s box. Apple will void your warranty. You can open up your device to a malicious person. Dare I say you might even open up your shiny Apple iDevice to an iVirus.
If you don’t know, jailbreaking your iDevice allows you the ability to install iApps outside of the Apple ecosystem. It also allows your iPhone to act as a wireless hotspot among other things. The US government recently sanctioned jailbreaking BUT Apple does not. In addition the bad stuff and the voiding of the warranty, it would get Steve Jobs really upset and we don’t want that.