Malware is like a bad virus that can make your computer sick. It can do bad things like steal your information or make your computer stop working.
Malware analysis is like when doctors try to figure out what kind of virus is making you sick so they can give you the right medicine to make you better.
People who do malware analysis are like computer doctors. They try to figure out what kind of malware is attacking your computer and what it's doing. They use special programs and tools to see how the malware works and what it's trying to do.
Then they take that information and use it to create new programs or tools that can stop that malware from attacking other computers in the future. It's kind of like a puzzle game for computer doctors!