Ad networks on PPD sites often use "pop-under" ads or fake "Download" buttons. Ensure you are clicking the actual file link, not an embedded banner ad.
Always run the file through a service like VirusTotal before attempting to open it with your specific software. How to Open an OCIL File upfiles ocil
Best if this is a request for help or a feature demo. Ad networks on PPD sites often use "pop-under"