Zf2 com DOMPDFModule

Fala galera.

Estou tentando gerar um PDF com o DOMPDFModule no Zend2 e ta acontecendo isso:

%PDF-1.3 1 0 obj << /Type /Catalog /Outlines 2 0 R /Pages 3 0 R >> endobj 2 0 obj << /Type /Outlines /Count 0 >> endobj 3 0 obj << /Type /Pages /Kids [6 0 R ] /Count 1 /Resources << /ProcSet 4 0 R /Font << /F1 8 0 R /F2 9 0 R >> >> /MediaBox [0.000 0.000 841.890 595.280] >> endobj 4 0 obj [/PDF /Text ] endobj 5 0 obj << /Creator (DOMPDF) /CreationDate (D:20171111011437-02'00') /ModDate (D:20171111011437-02'00') >> endobj 6 0 obj << /Type /Page /Parent 3 0 R /Contents 7 0 R >> endobj 7 0 obj << /Filter /FlateDecode /Length 661 >> stream x���Kn�0��9�,�H�f�7�l �VR�����b�0�X��䊽@oЅ�QF-V�VjA~�柙��8<�o'�$E�5HAP�F�(C���Ӣ�eU�}������"cQ�����#4EMd���I<+�C�I�Rri�(�.�4 �� 9G%տ��T��H@��~�ő�Pͮ�j�"B�Ka�4.&y��z��4j��M��K44(�J &��6�9ZԠ��qiue�X���iR̳"���D�i��gϽf������C�D��]���d}~�s���5��q�Q��!�����u��y�p{=���Y��(�Z9����a��5�5�z�v�x���k�V5,k��w�]��ma�tO�}��� ԫ����-ܵ]}���z��es��f�tP��Y��fw�T�ۮ٢��Ȕ�(���Fe���~

Estou tentando assim: isso esta no meu controller

        $pdf = new PdfModel();
        $pdf->setOption('fileName', 'report');            // "pdf" extension is automatically appended
        //$pdf->setOption('display', PdfModel::DISPLAY_ATTACHMENT); // Triggers browser to prompt "save as" dialog
        $pdf->setOption('paperSize', 'a4');                       // Defaults to "8x11"
        $pdf->setOption('paperOrientation', 'landscape');
        $pdf->setVariables(array(
            'lista' => $lista,
            'total' => $total
            ));
        
        return $pdf;