If you need to read pdf from Boomi Atom installation path,then use code something like this in map function. byte[] filebytes = new File('\\\\'+path+'\\'+filename+'.pdf').readBytes() String strEncoded= filebytes.encodeBase64().toString() name = filename+".pdf"; fileContent= strEncoded; fileContent stores the encoded base 64 data.
Dell Boomi / Salesforce Developer