On September 18, 2019, the domain secure[.]adnxs[.]com was blocked in error as being related to adware.
Secure[.]adnxs[.]com is owned by AppNexus Inc., a legitimate online advertisement company. secure[.]adnxs[.]com and appnexus[.]com are both clean of any malicious behavior.
Advertisements hosted on the subdomain ib[.]adnxs[.]com have been seen to contain malicious code that leads to the installation of adware. When triaging ib[.]adnxs[.]com, the other subdomain secure[.]adnxs[.]com was included in error.
Our team quickly identified the issue and removed the domain secure[.]adnxs[.]com from our blocklists. We apologize for the false positive alerts this caused. There is no action required on your part and you can safely ignore these alerts. If you have any further questions or concerns regarding this domain or others please contact us.