Large amount of blacklistings on that IP : https://www.virustotal.com/en/ip-address/5.101.152.55/information/
Blacklisted : http://www.urlvoid.com/scan/filigrana-spb.ru/ https://sitecheck.sucuri.net/results/filigrana-spb.ru
Blacklistings on the IP and AS : http://urlquery.net/report.php?id=1484475556059
Vulnerable libraries used : http://retire.insecurity.today/#!/scan/51e4dc515b7c3e21ccad34a308a6e50c41e5223c3a56939fb2c037b2f86123a1