Original title from InformationWeek was: “Twitter For iPhone Attracts Malware”. Which is blatantly misleading.

Mathew Schwartz:

One recent attack, which aims to swipe users’ banking information, is capitalizing on the release of the first official Twitter iPhone application. Click a link in an attacker’s Twitter post — one offending message says it’s the “Official Twitter App” — and get directed to a website hosting a Trojan application. Run it, and your Windows PC can end up compromised by a worm that’s gunning for your online banking credentials.

This is no different than using Viagra to attract people to click links, InfoWeek just wanted the site traffic.