Timmy, unsure 'exactly' why other than what's in the report posted below (spyware), but, the image site you're using is on MalwareBytes Premium bad web reputation list. I was unable to view the image.
I do find the port odd. I'm unsure if that's MY port, or the one it tried connecting to server side. Not a standard https port, but within realm of randomness if local.
(Fact it says outbound makes me think remote?)
Malwarebytes
www.malwarebytes.com
-Log Details-
Protection Event Date: 7/6/19
Protection Event Time: <time i loaded this page>
Log File: ac412da2-a052-11e9-9af0-20cf30e3f3ae.json
-Software Information-
Version: 3.7.1.2839
Components Version: 1.0.586
Update Package Version: 1.0.11418
License: Premium
-Blocked Website Details-
Malicious Website: 1
, , Blocked, [-1], [-1],0.0.0
-Website Data-
Category: Spyware
Domain: u.cubeupload.com
IP Address: 46.4.115.108
Port: [60147]
Type: Outbound
File: D:\Program Files\Mozilla Firefox\firefox.exe
(end)
As for an archive search, I love the idea.
I tried google searching to assist someone here just this week, found a search result that I'm 90% sure would have helped, if only it didn't like to the (now defunct) forum.
(Unfortunately, there was no 'cached' link for it using google either)