Get the Whitepaper called PDF Silent HTTP Form Repurposing Attacks.This paper sheds light on the modified approach to trigger web attacks through JavaScript protocol handler in the context of browser when a PDF is opened in it.
You can download it from the following link: https://packetstormsecurity.com/files/download/77245/SNS_09_03_PDF_Silent_Form_Re_Purp_Attack.pdf
Source: https://packetstormsecurity.com/files/77245/PDF-JavaScript-Attacks.html