Suspicious Abnormal HTTP Response Found

[Sjoerd]

My customers are complaing that they're not able to open the website www.sligrofoodgroup.nl

Our "Antvirus / Anti Spyware Block Page" kicks in, and in the threat monitor i see it's blocked cause off the vulnerability "Suspicious Abnormal HTTP Response Found" in the favicon.ico file:

https://threatvault.paloaltonetworks.com/?query=40393

What does this exactly mean and is it save to allow this traffic? 

[Rich_G]

Here is some information on HTTP Evasion Detection Signatures which Suspicious Abnormal HTTP Response Found falls into.

https://live.paloaltonetworks.com/t5/Threat-Vulnerability-Articles/Understanding-HTTP-Evasion-Detect...