Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eead577fed7a630…

MALICIOUS

PDF

40.7 KB Created: 2020-08-02 16:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11b1f30450e27e8867914c5002222cee SHA-1: ace75277a5741003de056ce7ff348f9968b69090 SHA-256: 8eead577fed7a6305cab057276d18832c77a165a54c2b780bf3248b380086ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a malicious redirector link, https://ttraff.cc/pify?keyword=m2ts+to+mp4, suggesting a social engineering lure to trick users into downloading further malicious content or visiting malicious sites. The document body also contains text related to file conversion, potentially as a pretext for the malicious links. The presence of a browser extension installation lure further supports the social engineering aspect.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=m2ts+to+mp4
    • http://files.clearlakedebate.org/uploads/1/3/1/3/131380171/1038f86.pdf
    • http://files.westburnsvalleysolar.com/uploads/1/3/2/6/132683330/zewujo.pdf
    • http://files.2012junobeachpdtourtribute.com/uploads/1/3/1/6/131636843/zufokerofeta.pdf
    • http://files.amillennialstory.com/uploads/1/3/1/1/131164100/lelevuzeka.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/91871477605.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/8327475654.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/momexegezeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/pafevunusipavedopase.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/dilizusazevipuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/fijajokiwilega.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89352644259.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/zutimuxatefotafis.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/346358411.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/beves.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_off000063b2.bin
fdaf1a1c78acd0c75d58f92f47ef83f429c19a8dacb1acf5e918e831d220481e
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B2 4852 bytes
font_01_sfnt_off0000743b.bin
53b94b751b7e7230d703649966f6d5a60170991ba6c9b90418398ef6ab54582f
pdf-font-stream PDF embedded font (sfnt) at offset 0x743B 10032 bytes