Judas is a young man who works in a money-changing shop. He meets Yeshua and under false pretenses tricks him into criticizing the state authorities (who are lying in wait to arrest him). Judas is paid by Joseph Kaifa for his service but does not live to enjoy the money; he is lured by the attractive Niza to an olive grove outside of the city, where the hooded Pontius Pilate murders him.
Judas of Kiriath Character Timeline in The Master and Margarita
The timeline below shows where the character Judas of Kiriath appears in The Master and Margarita. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 2. Pontius Pilate
...anything bad about the emperor, Tiberius Caesar. Pilate questions Yeshua privately on whether he knows “Judas from Kiriath” and if Yeshua said what he was reported by Judas to have said.... (full context)
Chapter 25. How the Procurator Tried to Save Judas of Kiriath
Chapter 26. The Burial