Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b37f8c904ee850…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 16:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574812fa965a1c6fed98f5d6a41ba84a SHA-1: 187a723a34744155d2d32dd6f17bd79c4a8628b9 SHA-256: e8b37f8c904ee85009df4e3d52c3b0ece2c18bea7753a430d9e717fd32b87d95
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the critical heuristic. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.ru/pify?keyword=alzheimer+precoz+pdf
    • http://files.dukeladyblue.com/uploads/1/3/1/1/131164236/8c98cd931d5a.pdf
    • http://files.vie-delequipmentsales.com/uploads/1/3/2/6/132681062/9721829.pdf
    • http://jupafel.bechtandson.net/uploads/1/3/1/1/131163667/naregamut-zesurivizixi-ninoto-vefiletidijede.pdf
    • http://tavokew.indiapropertyinsurance.com/uploads/1/3/0/7/130775795/sasalugopok.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/xitujunenidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/7547996224.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5042/files/adjective_and_adverb_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/value_guide_conveyor_components.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/alexa_mohl_aprendiz_de_brujo_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/javascript_close_window.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/15361353035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/kemibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/pokilexoxojikuzine.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/fofojokabaxidasitika.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/5326249468.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_off000079e6.bin
3068044d3f9f908c11ea227a4aef4b344eda3ba44cb97d34157ac36b5cdb6e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E6 5044 bytes
font_01_sfnt_off00008ae9.bin
f724ef1f9623a7bdc5bb822da007a2173d63d5eb6c6f9db06b3edf75d89c9909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE9 10396 bytes

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