Researchers from GreatHorn report they have observed a nearly 6,000-percent jump in attacks using malformed URL prefixes to evade protections and deliver phishing emails that look legit. Attacks between January and early February spiking by 5,933 percent, they said. Malformed URL attacks could be mitigated through third-party solutions able to perform more nuanced analysis, researchers said. The attackers using these malformed URLs have engaged in a variety of tactics to deliver their malware.
Source: https://threatpost.com/malformed-url-prefix-phishing-attacks-spike-6000/164132/