node.js pdf2json how to parse PDF from array?

I am using node version 7.10.0 with:

pdf2json version 1.1.7 mail parser version 2.0.5 smtp-server version 3.0.1

I have received an email with a PDF attachment and I want to parse the PDF using pdf2json without saving the PDF to disk, I have the byte array from the email attachment. How can I parse this directly to the module?

I thought I could do this:

    const pdfParser     = require("pdf2json");

    let objPDF = new pdfParser();
    objPDF.parseBuffer(arybytContent);

Where 'arybytContent' is the content from the mail attachment:

    arybytContent = objAttachment["content"]["data"];

Looking at objPDF using Chrome, it doesn't look like the content has been parsed correctly, have a used the class incorrectly?

via SPlatten