alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP pdfspeedup Initial CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/pdf-service/v1/action?"; startswith; fast_pattern; content:"os="; content:"device_id="; pcre:"/^[a-f0-9]{32}/UR"; content:"version="; content:"qd="; content:"day="; content:"t="; content:"product="; content:"machine_name="; http.header_names; content:"Host|0d 0a|Connection|0d 0a 0d 0a|"; reference:md5,cbb857a25e7dde72364684d2b90fb1ac; classtype:pup-activity; sid:2038627; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_08_25, deployment Perimeter, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_08_25, reviewed_at 2025_07_14;)