No, the only way to collect information about an attachment "Name, file size, type" is to open a message that contains the attachment from a mailbox itself.
If the attachments are being sent out by an applications/appliance and they are sent to a particular Mailbox within your Exchange Organization, then you can use the Mailbox Contents collection and specify the Mailbox Target(s) that those messages are in.
UC-Analytics uses the Mailbox Contents collection for attachments based on the Mailbox Target(s) specified in the Data Source.