Maybe, the site is hacked. Site supposed to be owned by Kishonti.net (https://kishonti.net/
- also the same symptoms, now). Seems all their sites have the same problem: expired certificates.
I should say, it should be save. Roughly a year ago Kishonti produced Linux GFX test version on the suggestions from INTEL guys from https://01.org/linuxgraphics/forum
Behind this idea, behind https://01.org/linuxgraphics/forum
GFX guys, pushing this very hard, was me. I wanted standardized Linux Benchmark to test INTEL integrated GFX against Nvidia and AMD/Radeon. INTEL integrated GFX showed with couple of other tests (2D-mark test in particular) disastrous results in comparison with GFX competition!
I do not think Kishonti.net is one doing nasty stuff. But you can try this (Linux) test benchmark, and let us know your opinion.