Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bcce7a46b4a78d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 18:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 775f584858e483ade83ba69a6bb92808 SHA-1: 16b07031e961fc9b99aaffb86a8679baba1076a0 SHA-256: 97bcce7a46b4a78d806f550bf964191ea8a5cf01a7dae3485209f2905c2aa054
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary redirect URL is 'https://ttraff.ru/pify?keyword=certificado+medico+ministerio+de+salud+pdf', which is likely used to lure victims into clicking on further malicious links. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=certificado+medico+ministerio+de+salud+pdf
    • http://files.redroostergrill.com/uploads/1/3/1/4/131406762/59e6a4578591d.pdf
    • http://files.readingparent.com/uploads/1/3/1/4/131408415/daxonelotasuvedi.pdf
    • http://files.aloannomore.com/uploads/1/3/2/8/132814826/bolatadudi-jupavisevo-dusunesa-larofewigim.pdf
    • http://files.minimiel.com/uploads/1/3/1/4/131453028/dfd014069.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/zafuxerijebekinuwafavowip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/togajoduxabunitozedetoli.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/the_walking_dead.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/avaya_9508_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/63840290239.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/namexal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/jasefusapokawapupagupepe.pdf
    • https://cdn.shopify.com/s/files/1/0450/4931/5478/files/schema_ampli_audio_a_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/zedigosipijibepuwepebimo.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_off00006db8.bin
5e9ffa82f549548558a5e0cb9989bb9365c93cabbae41ab83a8c7bad116d0565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 5208 bytes
font_01_sfnt_off00007f4c.bin
4b1fff5d3a02903602b1d233bb7b3dab9a3fa6b0dcfd394ac969dcf5e142c72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 11028 bytes

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