malformed vs deformed

malformed and deformed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
malformed	No	Yes	No	No
deformed	No	Yes	No	No

As adjectives, malformed and deformed are synonyms defined as:

Other synonyms of malformed include distorted, ill-shapen, misshapen.

malformed (adjective)	deformed (adjective)
so badly formed or out of shape as to be ugly	so badly formed or out of shape as to be ugly