Detecting Viral Propagations Using Email Behaviour Profiles.
You can download it from the following link: https://packetstormsecurity.com/files/download/51895/Detecting-Viral-Propagations-Using-Email-Behaviour.pdf
Source: https://packetstormsecurity.com/files/51895/Detecting-Viral-Propagations-Using-Email-Behaviour.pdf.html