Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bee3fba59a21ef8…

MALICIOUS

PDF

33.8 KB Created: 2020-08-20 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b2690701c061c64d56db7a49b93258 SHA-1: ec393f526b8dc5d952d14b38986216aac17810ae SHA-256: 3bee3fba59a21ef80a0810bb1b6f551ebf6f02c7283eb862fef9a1857af16f0d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=barasuara+taifun+rar`. Additionally, it exhibits a PDF link farm behavior, embedding numerous links, some of which lead to unknown domains. The document body, though heavily obfuscated, contains the malicious URL and other PDF links, suggesting a lure to external content. No scripts were extracted, but the presence of multiple unknown URLs indicates a likely attempt to lead the user to a malicious site.

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=barasuara+taifun+rar
    • http://nalamufad.polarlondon.com/uploads/1/3/1/6/131637254/butowenozad.pdf
    • http://wanito.deliberatetattoo.com/uploads/1/3/1/4/131406893/tejufepu.pdf
    • http://vilenon.javierbatanero.com/uploads/1/3/2/6/132682090/4841482.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/82385852959.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/98344108210.pdf
    • https://cdn.shopify.com/s/files/1/0451/0665/9493/files/secured_copy_text.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/cartina_turistica_puglia.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/25396990819.pdf
    • https://cdn.shopify.com/s/files/1/0438/9234/2939/files/pv_function_excel.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/vacuna_neumoccica_polisacarida.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/buwijemetomotirojugan.pdf
    • https://cdn.shopify.com/s/files/1/0436/5064/6169/files/doom_3_cheats_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/direct_and_indirect_object_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/24547445711.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/92092818834.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_off000046de.bin
b0f73a6c39232f66c999967914685369ebb59ad79a7feee77b811fcaa27125cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DE 4780 bytes
font_01_sfnt_off0000572d.bin
028c1c9c4338927fc0cd463508e7fd3a32c2a2ebf1bf7287212686f41361ef76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572D 10416 bytes

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