What does the following do?

TrojanDownloader.OpenConnection.MU trojan

Summary
TrojanDownloader:Java/OpenConnection.MU is the detection for a malicious Java applet trojan that exploits a vulnerability described in CVE-2010-0840. Successful exploitation may lead to the downloading and execution of arbitrary files under the user's security context.



I think this one is reasonably new?
Exploit.Pdfka.OTO.Gen trojan

Should I be worried?

 

Basically pdf malware downloads other Trojans or malware from the web. If it was detected the exploit should not have been executed.

 

AppData\LocalLow\Sun\Java\Deployment\cache\6.0\16\d9112d0-5cdb8043 » ZIP » asdasd/Stremer.class - a variant of Java/TrojanDownloader.OpenConnection.MU trojan


AppData\Roaming\Auslogics\Rescue\Sony Maintenance\110404231422535.rsc » ZIP » 110404231422535-000132.file - JS/Exploit.Pdfka.OTO.Gen trojan

So this is the places they were found.