The Internet Storm Center reports that a large number of Joomla sites are currently deploying malicious code and infecting visitors with malware. The attackers embed an iFrame into the web sites that points to a Sutra Traffic Distribution System and eventually redirects to an exploit kit. Similar attacks have also been observed in Germany, according to the German CERT-Bund. Computer Emergency Response Team. The criminals have now started to cash in: they are using so-called Traffic redistribution systems that buy and sell web traffic to convert the hijacked servers into hard cash.”]
Source: http://www.h-online.com/security/news/item/Joomla-sites-misused-to-deploy-malware-1766841.html