Here comes just another volumetric DDoS reflected attack.
The amplification rate looks quite good (35:1)
Apparently there are many hosts online to pick from
65,538 on Shodan right now, seems
A lot of Macstadium host are actively being exploited apparently
If you have your Apple MAC in a DMZ or directly with public IP please properly secure port 3283
Searching online seems someone else is actually seeing this pattern.
Arbor (Netscout) has some more detailed infos published: https://www.netscout.com/blog/asert/call-arms-apple-remote-management-service-udp