alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP pdfspeedup Keep-Alive"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:22; content:"/pdf-service/v1/report"; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|referer|0d 0a|"; http.request_body; content:"|5b 7b 22|action|22 3a 22|"; startswith; fast_pattern; content:"|22|day|22 3a 22|"; content:"|22|device_id|22 3a 22|"; pcre:"/^[a-f0-9]{32}\"/R"; content:"|22|location|22 3a 22|"; content:"|22|os|22 3a|"; content:"|22|qd|22 3a 22|"; content:"|22|random|22 3a|"; content:"|22|status|22 3a 22|"; content:"|22|version|22 3a 22|"; reference:md5,cbb857a25e7dde72364684d2b90fb1ac; classtype:pup-activity; sid:2038628; rev:3; 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 2024_04_30, reviewed_at 2025_07_14;)