Malicious PDF — malware analysis report

Static analysis result for SHA-256 1009351b9d3823f1…

MALICIOUS

PDF

37.8 KB Created: 2020-08-12 18:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a600ae97930fbaf13804a55b60e1026e SHA-1: 717ef7ab4e01ab50e63b7b916a671743af70090a SHA-256: 1009351b9d3823f11460abb4f3437b031a9f86ca08d6ac0ffe978545bbe0b9b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=guide%20de%20l
    • http://files.francoisebabytourguide.com/uploads/1/3/0/8/130814052/0f36728b46.pdf
    • http://files.ipmed.org/uploads/1/3/1/8/131856945/geputuz.pdf
    • http://files.amylouise-psychotherapy.co.uk/uploads/1/3/1/1/131164431/3555838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/mijazegamikaruwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/vabuvinekevugadepanopebip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/wojadugisedufexade.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/36176453342.pdf
    • https://cdn.shopify.com/s/files/1/0433/0035/6251/files/mitetaxulepalewozuke.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/dizigigagedununube.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/an_inspector_calls_revision_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/vascular_vs_nonvascular_plants.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/e7_bd_91_e6_98_93.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/42745006773.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/wafuvuxinubutifazivozo.pdf
    • https://cdn.shopify.com/s/files/1/0454/9564/8408/files/definition_of_industrial_economics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/48966277954.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_off000051f1.bin
c869871fce8f76d10dc429c2d869f7f1a0ec9ccf24ac6a8e181ce29899ce0699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F1 5252 bytes
font_01_sfnt_off000063be.bin
af0679141de0439bc03b96d5ebadca488bc3a912e78b576c2554f008bc2b9fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 11752 bytes

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