I second this reasoning. It's ALWAYS a scam if they say a vague "I came across your work on " and give no links or do not say their position within a company.
Also... they asked you to post works on their platform--BIG RED FLAG. They basically want to steal your art by having you upload the original files at full res. -_- I hate these people.
They also have a grammatical error as well: "I found out your work really intriguing"
But real people DO make grammatical errors, even in a professional setting... though it's rare.
Btw, this is a type of thing a LOT of artists get all the time. Especially when your artwork is between decent - very good, but you aren't a well-known artist with a huge online presence. They prey on the fact that not all good artists are popular, so they think they can get away with these types of scams because it sounds exciting. :{
Take care of yourself out there! Your art community has your back. :}