Experts at CloudFlare revealed that 94 percent of the Tor traffic they see is per se malicious but Tor Project opposes it. The content delivery network (CDN) has analyzed this issue in a blog post entitled The Trouble with Tor. The Tor Project has released a report that analyzed the impact of the Cloud flare actions on the Tor users. The Tor project says the malicious traffic is generated by a tiny fraction of the millions of daily Tor users”]
Source: https://securityaffairs.co/wordpress/45897/deep-web/malicious-tor-traffic.html