Malicious PDF — malware analysis report

Static analysis result for SHA-256 970891b1999c1928…

MALICIOUS

PDF

49.1 KB Created: 2020-08-06 13:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18899739972fa642dbe63e9cd3041720 SHA-1: 2af144c31d99c6975187342dd7296b034cee44de SHA-256: 970891b1999c1928c41bb0ecc83e65bfc9cb25c512414e78331f4f0a946f0895
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting an 'online registration form' lure, aligning with the SE_INVOICE_LURE heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, suggesting an attempt to distribute malicious content widely.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=nbi+online+registration+form+pdf
    • http://files.pinnaclelightinganddesign.com/uploads/1/3/1/8/131871518/givof_vozal_liromenudi_bugaremujafi.pdf
    • http://files.aogshoetique.com/uploads/1/3/1/0/131070820/xubuxovupa-dawova-wezudada.pdf
    • http://files.carolinerosenblum.net/uploads/1/3/1/3/131379409/6307091.pdf
    • http://julemoro.theblessedlifeonline.com/uploads/1/3/0/7/130775918/9b504fcef13c58.pdf
    • http://files.activelaboratoryinc.com/uploads/1/3/2/7/132740343/vakidob.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/dugesaban.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/plan_y_programas_aprendizajes_clave_sexto_grado.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/sukiguruj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0434/5613/5334/files/catia_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/ziguvew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/canela_de_velho_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/game_of_life_quarter_life_crisis_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/49603217566.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/87338604170.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/ciclo_biologico_ascaris_lumbricoides.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/dofafasogepegu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c6.bin
2fbbe6a6b2999dda1c18ca3c5757694f590c5c47ca12e8118b564ee558b1017d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C6 5260 bytes
font_01_sfnt_off00008682.bin
2565910022c1f596abcfcfb4e5e82e173e2c6578f2d18539ed4b2b1a98e8845c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8682 10192 bytes
font_02_sfnt_off0000a946.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA946 4324 bytes

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