This classification looks at the classification of the actual file that is being stored, using an identifier that’s embedded in the file header of the object. As an example, this classification could be identified as a document or source code. Each object stored is associated with a set of predefined content types, which would also indicate its risk factor.
A sample of these content types can be seen here, taken from the Management Console:
As you can see, there are five different fields that are used in this classification method. The Name and Description fields define the file type that's associated with the object, such as a Microsoft Excel file, as seen in the last row of the excerpt of the preceding screenshot. Classification is what Amazon Macie determines the file classification to be, such as Binary, Document, Plain Text, and so on. In the Microsoft Excel example, the classification is identified as Document.
When looking at the Risk column...