I don't know how, but this got onto my computer. I found a ShopAtHome toolbar and exited out of it, uninstalled it, then it was still on my computer. It took me a few scans to get rid of this. It was detected as Adware.ShopAtHome-Select by SUPERAntiSpyware. (I have Norton Antivirus 2010 now)
Anyway, itanimulli.com is a domain of the official NSA website. Completely safe.
Norton has only detected Adware.Lop, but I think the site itself is a rogue antivirus domain. Stay away at all costs.
Saw this on an ad on Runescape, and by the looks of the thumbnail, it doesn't look anything like what it says, lol. It looks like some sort of rogue antivirus site... 0_0
My best guess: It's a virus.