NOTE: I'd call myself a n00b developer from Down Under.
In relation to the OP, a Google search of the below IP lead me here.
As an effort to minimize Spam, setup this bad bot blackhole as per: https://perishablepress.com/blackhole-bad-bots/
First hit reported by Blackhole, in part, was:
Tuesday, November 27th 2018 @ 11:36:37
URL Request: /blackhole/
IP Address: 18.104.22.168
User Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.2 (KHTML, like Gecko) Chrome/22.0.1216.0 Safari/537.2
If you see inaccuracies in the results, please report at https://www.arin.net/resources/whois_reporting/index.html
Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
NetRange: 22.214.171.124 - 126.96.36.199
Parent: NET52 (NET-52-0-0-0-0)
NetType: Direct Allocation
Organization: Amazon Technologies Inc. (AT-88-Z)
OrgName: Amazon Technologies Inc.
Address: 410 Terry Ave N.
If it was a legit bot, it should NOT have tried to access this directory /blackhole because robots.txt specifically Disallowed this.
AbuseIPDB reports: 188.8.131.52 was found in our database!
This IP was reported 49 times. Confidence of Abuse is 43%
To me, the blackhole code shows that this not to be legit behaviour and now that IP is banned from accessing the site that it targeted. So vigilance is certainly paramount.