Spanish translation! I need someone to help me figure out a word that is similar to "shady" or "sketchy."?

I don't want it to sound like I'm being rude or bitchy. I know certain things in the spanish language hold a much stronger or more offensive meaning than others and I don't wish to offend this person. I just wish to basically say "You're being shady." He's Peruvian. I know dialects differ slightly too and some words are used in some countries that aren't used in others. So hopefully that helps. All comments are appreciated! :o)Spanish translation! I need someone to help me figure out a word that is similar to "shady" or "sketchy."?
T煤 haces sospechoso.

nivea cream