It’s a print from a book called “Star Wars -Propaganda”
I assume it’s this - Star Wars Propaganda: A History of Persuasive Art in the Galaxy
I think you’d probably like this book then. Most of the art is online elsewhere but I’ve always wanted the book
Star Wars Propaganda: A History of Persuasive Art in the Galaxy https://www.amazon.com/dp/0062466828/ref=cm_sw_r_cp_api_glt_fabc_4136RGWCJNWMQNW3HMBK , Is it this?
This is one of my favorite Star Wars source books for the Empire era. Definitely worth a look if you are asking this question.
The artist is unknown, which is a shame - because it's the cover of this book: https://www.amazon.com/Star-Wars-Propaganda-History-Persuasive/dp/0062466828
art is from this book.
They actually recently made a guide book on this. It also has some great r/empiredidnothingwrong art too.