Sending job information to a list of candidates works the same way as sending email to a list of contacts with one difference, you can select a company and job, and choose a job attachment to attach to the email. The company and job information can be used in the personalization of the email. See here for a list of available placeholders.
You'll find the option to select an a job and an attachment from the job record add it as an attachment to the email message. You'll first need to select a Company to be able to select the job and its attachment.