Is this a phishing attempt or Legit Quick invite link?

Someone I am friends with on steam, recent friends, who I have played CS2 with a bit already, sent me a quick invite link. The link is as follows: "s.team-kt. com/p/xxxx-xxxx/xxxxxxxx/". Isn't it supposed to me "s. team" ? Not "s.team-kt" ?? Has anyone seen this before and is it legit? I have also received
"s.team-pf. com" as well in the past...are these legit??