Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4d50f8cc440f5f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 14:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3b7056d4608cabe5fd885e50df5e27 SHA-1: 49f97a6d4e11b9bc8ffd97a7b31540b751354dfd SHA-256: bf4d50f8cc440f5fbc1f71b2a52029c7c0ad253d9e3017bc659028ad7f2cf497
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link that points to 'https://ttraff.com/pify?keyword=job+tasks+template'. This URL is designed to lure users into clicking it by presenting itself as a job-related template. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=job+tasks+template
    • http://javibiw.entacobowlsclub.com/uploads/1/3/0/7/130775403/bbaec23215.pdf
    • http://resalike.innerframework.org/uploads/1/3/0/7/130738890/rowizoliledaviri.pdf
    • http://gujas.jaredhammer.com/uploads/1/3/0/7/130740044/062ea34b107.pdf
    • http://files.spotlessga.com/uploads/1/3/1/4/131437276/begadanodawi_mevudav_zabijusisukopat.pdf
    • http://fiwokix.janpeterdegraaff.com/uploads/1/3/1/3/131381464/3050227.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/guvoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0443/9366/0582/files/william_shakespeare_sonnets_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/65166450303.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/tetekurobadozenofomilas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/damugok.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/wobumulelusogojelum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/20979520888.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/22771068585.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/581847594.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/bajogav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/jurnal_abortus_spontan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fec.bin
b3d814ff43c3ea07f0907d26435300e3b6991f35eea97219631697695368756f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEC 5060 bytes
font_01_sfnt_off0000810f.bin
61b5e72d869dd3742d4df057aacac396724b19979debeef56a3ba4bfcbfbcac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810F 9768 bytes

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