ad468x60_1.url definition, relationships, removal:

The ad468x60_1.url file is an essential part of a particular parasite and therefore is responsible for the pest's malicious activity. Exact purposes of ad468x60_1.url depend on the related parasite's type and carried payload. Some threats can use ad468x60_1.url to serve annoying pop-up advertisements or store certain configuration settings, while others need it to corrupt files, steal user confidential information or run a spreading routine. In any case, DO NOT open this file!
The ad468x60_1.url file is installed and used by Midnight Oil.
Sometimes a presence of ad468x60_1.url does not indicate that your computer is infected. It can be an essential system file or a file installed by harmless legitimate software and therefore may not pose any threat to your privacy and the system. Although such cases are quite rare, you should thoroughly examine ad468x60_1.url before completely deleting or leaving it in the system.