Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea26aba3edb6b4d…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 19:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8392ccd045d7b58cf55c8d299b4599ff SHA-1: 40bcb32b4a0fbf6cb79a9d6f8d9ffb6c914876b0 SHA-256: 2ea26aba3edb6b4d1c5e617b17ba3898bd35a08cb89140f61f2d1250d41b5dbd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to educational worksheets. The primary malicious URL, https://ttraff.cc/pify?keyword=stars+and+galaxies+note-+taking+worksheet+answers, is likely used to redirect the user to a further malicious destination. Another embedded URL, http://files.cspsaultzone.com/uploads/1/3/1/4/131408153/1907093.pdf, is also suspicious.

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.cc/pify?keyword=stars+and+galaxies+note-+taking+worksheet+answers
    • http://files.cspsaultzone.com/uploads/1/3/1/4/131408153/1907093.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/mogujilivafobisopes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/27185898157.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/womelabepumodirojajukoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/62986972382.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/80792438748.pdf
    • https://cdn.shopify.com/s/files/1/0435/9231/9139/files/adjective_phrases_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6554/files/mecanismo_de_accin_de_los_aines.pdf
    • https://cdn.shopify.com/s/files/1/0437/1592/0024/files/74849463781.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/advantages_and_disadvantages_of_centralisation_and_decentralisation.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/65983908335.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/pdf_amdal_pabrik_gula.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_off00004632.bin
ff31cef828ad2cb2434436fdd2896c94ca315e1c20f1a3f7b1ebd375050b89c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4632 5444 bytes
font_01_sfnt_off000058be.bin
3d8d43af72a2d7da01d59bdd6937d9735add08cb0262cabddb3466d2b5b5c8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 10284 bytes

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