Domain malware, Webazilla abuse?

Errors and warnings: https://mxtoolbox.com/domain/www.higheurest.com/

443/tcp open ssl/http nginx | http-robots.txt: 1 disallowed entry |_/ |_http-server-header: nginx |_http-title: Did not follow redirect to -http://google.com | ssl-cert: Subject: commonName=-higheurest.com | Subject Alternative Name: DNS:-higheurest.com, DNS:-www.higheurest.com | Not valid before: 2017-10-03T00:00:00 |_Not valid after: 2018-10-03T23:59:59 |_ssl-date: 2017-11-01T12:03:25+00:00; 0s from scanner time. | tls-nextprotoneg: |_ http/1.1
Consider: https://urlquery.net/report/a306a3c9-e3b0-4dd8-9300-4b757309b2a4
Mail to local postmaster: I got an error response to my "RCPT TO:" message. Your mail server does not accept mail addressed to "postmaster". I expected a response beginning with 250, but got the response:

550 No such person at this address"

[RFC2821 Section 3.6] Fail
Mail to domain postmaster: I got an error response to my “RCPT TO:postmaster@higheurest.com” message. Your mail server does not accept mail addressed to “postmaster@higheurest.com”. I expected a response beginning with 250, but got the response:

550-Please turn on SMTP Authentication in your mail client. -arwen.z-host.com
550-(dnssy.com) [81.94.198.122]:47904 is not permitted to relay through this
550 server without authentication.

[RFC2821 Section 3.6] Fail
WWW record: Your domain does not have a WWW record. This means that people will not be able to find your web site at http://wXw.higheurest.com. Skipping further WWW tests. Fail

Re: https://urlscan.io/result/0b7ab878-4b44-4cb5-9ce9-152e80bbe663/#summary

Re: https://zerocert.org/?code=7dd5440abdd6c68805e30b54c2590a9fe8f764ee2fafbf667130b8e77122dafb

Bad scan: https://www.scumware.org/report/194.187.98.225

polonus