According to a report in ITPro by Jennifer Scott, Kaspersky have been in touch to confirm that their servers were in fact compromised and the redirection was very real. The breach was made by exploiting “a third party app used for site admin”. The malicious redirection was in place for three and a half hours.
Several reports in Kaspersky user forums seem to indicate that the security software manufacturer was recently compromised by cybercriminals trying to punt fake security software.
More details: http://countermeasures.trendmicro.eu