Trying to parse a file upload

[scottswigart]

I'm getting an InvalidPDFException when trying to parse a PDF file upload:

var pdfParser = new PDFParser(this,1)
pdfParser.on("pdfParser_dataError", errData => console.error(errData.parserError) );
pdfParser.on("pdfParser_dataReady", pdfData => {
    console.log(pdfParser.getRawTextContent());
});
pdfParser.parseBuffer(req.files[file].buffer);

The file is uploading, and the buffer has data in it:

req.files[file] contains:
{fieldname: 'test', originalname: 'test.pdf', encoding: '7bit', mimetype: 'application/pdf', buffer: Buffer(167518), …}