Malicious PDF — malware analysis report

Static analysis result for SHA-256 055f8d47062accc4…

MALICIOUS

PDF

79.5 KB Created: 2020-08-10 09:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31975646d2964dca84fefb97906afa08 SHA-1: 6d0132fa77b821f87b97629b75efd8755bc3f1b3 SHA-256: 055f8d47062accc4bdc9f591889500ecee2b64bc013c80f0b7cd8172a381229b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, contains the same URL, indicating an attempt to disguise malicious activity as a legal document summary. No scripts were extracted, but the presence of malicious redirectors and the link farm pattern strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=carlill+v+carbolic+smoke+ball+case+summary+pdf
    • http://zawulinim.domesticfabrics.com/uploads/1/3/1/4/131482995/a4a539.pdf
    • http://files.luminousmusehealing.com/uploads/1/3/1/6/131637307/02113862ec88425.pdf
    • http://files.ulsupride.ca/uploads/1/3/1/6/131606819/nadogegigurude.pdf
    • http://files.nocontractppc.com/uploads/1/3/0/7/130776247/wavolibewuwubekexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/riwebubuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/mogijevupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/bevadimasomegotazak.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/kagunaguzivix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/ca_dmv_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/danokewujexuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/88404089932.pdf
    • https://cdn.shopify.com/s/files/1/0430/4407/7722/files/ncert_solutions_for_class_10_maths_chapter_arithmetic_progression.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/johnson_outboard_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3150/2749/files/gagowolom.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c8.bin
777c98bb86c7ee6d30533500d42735260d06b41237734ed97e6901b86551e0e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 5572 bytes
font_01_sfnt_off00010cb1.bin
e83ad37fe31ad6f2663509f9e031b60a72421cdce4cf0228dff369bacf811825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 10548 bytes

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