Hi,
I am adding an Attachment for a record in Account. It is saving the attachment as PDF for the record but when I try to open it showing "Failed to load PDF document". I am using RemoteAction for saving the attachment. Please can I know why?

This is my method in controller:
@RemoteAction
    public static void saveHTMLPDF(Id ehsId, String signatureBody) {
        Attachment a = new Attachment(ParentId = ehsId, name = 'pdfFromVf.pdf', ContentType = 'application/pdf', 
                                      Body = Blob.valueOf(signatureBody));
        System.debug('1. ehsId: ' + ehsId + ' signatureBody: ' + signatureBody);
        System.debug('2. Attachement a: ' + a);
        Database.saveResult result = Database.insert(a, false);
    }

VisualForce page code:
<script type = "text/javascript">
    function savePdf() {
        var x = document.getElementById("savePDF");
        x.style.display = "none";
        var ehsId = "0012x000006LNsN";
        var pdf = new jsPDF();
        pdf.addHTML(document.body, function() {
            Visualforce.remoting.Manager.invokeAction(
    '{!$RemoteAction.HTMLSignatureCodeController.saveHTMLPDF}', 
            ehsId, pdf,
            function(result, event){
            },
            {escape: true}
        );
        });
   }
    </script>

Thank you,
Bharath Kumar Thota