Could we have this file for analysis also? At least entire javascript code....
No 
maybe,the javascript code its not important ,javascript only make a heap spray with a address,but from the info on the net, cant find the exploit address,so the head of jbig2decode stream i think is very important
also ,in windows,if the mouse jump to the PDF file ,the acroRD32info.exe will open it without using reader,
add me with icq 94507815 and get more info