Virus like activity on iPhone 4S when opening yahoo.com website

When opening the yahoo.com website, touching the screen leads to the keyboard popping up (image is grainy not the actualy keyboard)  Then the words "all the activity has led to this" is automatically typed in the search field.  I can stop the writing by clicking on the "close x" button that also pops up with the keyboard layout.  If I don't stop it, the search leads to the paranormal activity movie's site, then a message for an incoming video call pops up.  I haven't gone past this point.  Everything else seems normal.  If I hit the "close x" I can go on browsing the internet and yahoo.com.  It doesn't seem to be malicious but just annoying.  But the bigger issue is where/how I got it and if it is a virus.  Please help.

Thanks,

John