What is this aircraft with wings seemingly fixed the wrong way?
It looks like the Cessna Citation II of which hundreds were built.



By Adrian Pingstone - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2971403

The wing profile is trapezoidal, as can be seen in the image below.



Image from avistar.org

This kind of wing design is found in a number of aircraft, for example the other Cessna Citation series aircraft and the Embraer Phenom 100.



By Josh Beasley from USA - Private - Embraer Phenom 100 - N629AS (26/365)Uploaded by tm, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=25761759