TamperedChef Malvertising Campaign Drops Malware via Fake PDF Manuals

TamperedChef is a widespread malvertising campaign that lures users searching for appliance manuals or PDF tools into downloading trojanized documents and an application (ManualFinderApp.exe) which operate as infostealers and backdoors; the campaign leverages targeted search ads, staged payloads, abused code-signing certificates, and a 56-day delayed activation to evade detection and achieve persistence across organizations in Europe, particularly in industries that frequently consult technical manuals.