.Png random string added to url requests
Our application server receives several dozen requests per day with an invalid URL containing a random link to an image at the end of the GET.
For example, our URL (with parameters) must end with the following:
&quiz_psetGuid=PSETC0A80101000000234e7960020000
And instead, it ends up with this when the server receives it:
&quiz_psetGuid=PSETC0A80101000000234e7960020000/cfyxqvn.png
The .png link is not ours, and we did not put it there. Needless to say, this prevents the URL parameter from being read.
This issue occurs from multiple user agents.
Any idea where this is coming from?
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We've seen these requests recently, and since they also come from registered contributors, it's pretty obvious that some add-ons (probably some malware) are installed on different machines. In our case there is no / added before the random string, so a valid url sucj as
/hu/stamps/countries
becomes
/hu/stamps/countriesudkatuuajqi.png
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