Please be careful with all PDF files, keep AV protection updated, and look for future Adobe releases which will address this issue. I usually keep JS off unless it's required to fill out a PDF form.
Adobe PDF Reader - Zero Day attack circulating
QUOTE: Adobe has confirmed a critical vulnerability in Adobe Reader and Acrobat 9.2 and earlier versions that could cause a crash and potentially allow an attacker to take control of the affected system. There are reports that this vulnerability is being actively exploited in the wild. Adobe recommends customers follow the mitigation guidance below until a patch is available
1. Launch Acrobat or Adobe Reader.
2. Select Edit>Preferences
5. Click OK