A seven-day malvertising campaign ran via Yahoo’s ad network for seven days. Security experts say Yahoo is an obvious target for malvertising campaigns, given its size. The frequency and severity of malvertising attacks has been increasing in recent months. Malvertising attacks are regularly directed at all large Internet advertising networks and may attempt to directly infect viewers’ devices with malware, or redirect them to a site that launches drive-by attacks (see Ransomware Attacks Subvert Ad Networks) Yahoo has confirmed the attack campaign, which it reports blocking as of Aug. 3.”]
Source: https://www.careersinfosecurity.com/malvertising-attacks-wont-stop-a-8451