Malicious PDF — malware analysis report

Static analysis result for SHA-256 350fe5b29b05604b…

MALICIOUS

PDF

33.4 KB Created: 2020-08-22 02:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b525e5fe0cd91a25363751772c5998a SHA-1: f3a63c7a34f0da6bdd1345063d5202f3fa73b4fb SHA-256: 350fe5b29b05604bb03c4c94cee9acf0de0047dc354df392a0f4fe03c1a9f468
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=adding+and+subtracting+with+regrouping+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted, and the document body's content is largely unreadable beyond the embedded URLs.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=adding+and+subtracting+with+regrouping+pdf
    • http://roges.muviscomm.com/uploads/1/3/0/9/130969103/89f47.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/43534869700.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/mec_powder_bushing_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/depukijefalisebojinufugas.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/15289588938.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/bazezanumoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/kowelivunovifuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/xifutilitiwuxukezira.pdf
    • https://cdn.shopify.com/s/files/1/0435/3697/3975/files/icone_chapeu_de_formatura_png.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/87329766738.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_off0000457d.bin
852632a5c7076825e0e2eb0b19b5a702dbaf9638518a86cb93e5b3590fca499d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x457D 5604 bytes
font_01_sfnt_off0000588b.bin
b85809be2ddf6e80bd2a838c1dae1a762f0e74d73e26879d3e7f4e467c3a3af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588B 9532 bytes

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