Get the Whitepaper called EvilQR – When QR Code Goes Bad . This is a security assessment of mobile QR readers.
You can download it from the following link: https://packetstormsecurity.com/files/download/104048/qrcode-goesbad.pdf
Source: https://packetstormsecurity.com/files/104048/EvilQR-When-QR-Code-Goes-Bad.html