Hello,
Our system has detected activity which may violate Google policies in one or more of your DoubleClick for Publishers line items. The reasons are listed below:
To ensure the safety and security of our users, we've disapproved your ad because we've determined that your ad hosts or distributes malicious software.
Although certain bad advertisers may intentionally distribute malicious software, there are many cases where the webmaster or advertiser is unaware of the dangerous link because:
1) The ad was compromised.
2) The ad doesn't monitor for malicious user-contributed content.
3) The ad displays content from an ad network that has an advertiser distributing malicious software.
Google uses its own criteria, procedures, and tools to identify and disable ads that distribute malware. To run your ad, follow these instructions to check your computer for malware, remove all malicious code from your ad, and submit your ads for review: https://support.google.com/adwordspolicy/answer/1308246