MALVERTISING 4 Trapdoor Android Ad Fraud Scheme Hits 659 Million Daily Bid Requests May 19, 2026 Malvertising Threat Actor D-Shortiez Abuses WebKit Back-Button Hijack Mar 3, 2026 Cryptocurrency Scams Target Asia, Combining Malvertising and Pig Butchering Feb 18, 2026 Malvertising campaign leads to PS1Bot, a multi-stage malware framework Aug 12, 2025