Once a user scans the QR code, the code redirects them to a site that will install a Trojan on their Android smart phones.
The growing popularity of Quick Response (QR codes) on smart phones has officially become a new distribution vehicle for malware on Android devices.
According to security researchers at Kaspersky Lab (important disclosure: my employer), hackers are are using QR codes posted on web sites to redirect smart phones to other sites hosting an Android trojan.