Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d9983e51cac61a…

MALICIOUS

PDF

33.1 KB Created: 2020-08-24 01:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc01b1a36511e9e911e1296ef4d65fd SHA-1: fd0b415a8bb34453aa3c5a70d898571f54d0c86e SHA-256: 56d9983e51cac61a1eb308f1febd9d7912d18c16372ceda370a8105de023e39a
130 Risk Score

Malware Insights

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

The PDF file contains a lure for 'Hd car background photos free' and embeds multiple links. One critical heuristic indicates the PDF links to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=hd+car+background+photos+free'. Another heuristic identifies a PDF link farm, with the first URL pointing to 'https://cdn.shopify.com/s/files/1/0432/7584/5792/files/megexirifuvinefuje.pdf'. The document body, though heavily obfuscated, contains these URLs and appears to be generated by wkhtmltopdf.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=hd+car+background+photos+free
    • http://files.tepeetonka.com/uploads/1/3/1/3/131379940/dewemu-zadatanosaluboz.pdf
    • http://files.emilyaustinphoto.com/uploads/1/3/1/4/131453574/6620216.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/megexirifuvinefuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/jujepezibaxijuzu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/printable_flyer_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/pukarawuwosediv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/lajelivome.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/29432007654.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/pegugefofefes.pdf
    • https://cdn.shopify.com/s/files/1/0462/1438/1722/files/81589730694.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/57114141253.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_off000044a4.bin
3f2df6a5f843d5f18a7c12208337236a5cbc087210bdf53af40141fff44e3970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44A4 5548 bytes
font_01_sfnt_off0000576d.bin
ff43394336f0d082c0fd566823158bc9e20f48ecea6d781ec0fbf7f19a0eae07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576D 9520 bytes

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