alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Likely Driveby Delivered Malicious PDF"; flow:established,from_server; file_data; content:"%PDF"; depth:4; content:"/Author (yvp devo)/Creator (bub lob)"; distance:0; classtype:trojan-activity; sid:2014142; rev:5; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2012_01_23, deployment Perimeter, confidence Medium, signature_severity Major, tag DriveBy, updated_at 2019_07_26;)