Facebook Messenger inserting web links into regular text?

Something interesting I noticed today with Facebook Messenger.

A friend messaged me:

“How we gonna celebrate Christmas this year with no tree”

And messenger somehow parsed the URL “christ.as” out of this, despite there being no URL in the text, making the whole message clickable.

Sender was Android, receiver (me) was iOS.

Can’t seem to replicate this when sending from iOS.

http://christ.as appears to be an empty holding domain, but I wonder if they’re seeing a spike in traffic from anyone mentioning Christmas.

Also wonder if this happens with any other words or phrases, and if there’s any potential “attack” vector by someone registering these domains.