The remote host has been compromised and is running a 'Backdoor' program
The remote SSL server is using a certificate which has been revoked. The particular SSL certificate has a serial number of '\x00\xf5\xc8\x6a\xf3\x61\x62\xf1\x3a\x64\xf5\x4f\x6d\xc9\x58\x7c\x06' and an Issuer of USERTRUST.
There is a high probability that your server has been compromised. You should manually inspect and fix this system.