Because this is not a common file, you should treat it with caution unless you intentionally installed aviation-related software.
Run a deep scan using Malwarebytes or the Farbar Recovery Scan Tool (FRST) to ensure it isn't a malicious file masquerading as a local utility.
: It may be a protection or licensing module for flight planning software, airport management tools, or scenery packages used in simulators like X-Plane that feature KWJF .