Malicious PDF — malware analysis report

Static analysis result for SHA-256 65adcb43ea58ff2b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 18:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7907d76aafabff3f25914b699e0d19c3 SHA-1: c5e0a1913f23ac0554a8287c29a30bec0f5d2f6e SHA-256: 65adcb43ea58ff2b490b37c0e78ba31898703f41f79e30349c131addd1464ee7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious link identified is https://ttraff.ru/pify?keyword=bardavon+health+innovations+pdf, which is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains references to the same redirector and other Shopify links, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=bardavon+health+innovations+pdf
    • http://files.clintonstudio54.com/uploads/1/3/1/3/131379868/zowuvalirofuru-zuzizagotomabow-todosa-zadidipufod.pdf
    • http://files.edithaliggagne.com/uploads/1/3/1/4/131408100/titelet-togijubududep-fakagule-rilovebonolif.pdf
    • http://files.fourwallsnoceiling.com/uploads/1/3/1/4/131406258/fupatowul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/12139138851.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/wixovoleb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/32493558535.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/nemapurisuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/security_risk_assessment_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/77542056065.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/ctet_july_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/36777550344.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/65372552496.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/13206578542.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/95809033423.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.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_off00005c39.bin
117ffc9be67778c9678bc52079024a02f2549600b026d144817e210ed5ea730a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 5236 bytes
font_01_sfnt_off00006e09.bin
a842ed731d9d23f25a2aa394979ab65f200687f0c8172f9ecdf00cd296ed10f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 13368 bytes

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