Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bd12ffb4bfa0a4…

MALICIOUS

PDF

45.5 KB Created: 2020-09-22 17:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f24239d500555741372125d510d63e SHA-1: e634f4d65003e792362f4c7d469c321516a9d6cd SHA-256: 07bd12ffb4bfa0a48e5e39f9f893c415da11ed45ac4dc55d43e7c6845d47f7a0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to distribute further malicious content. One prominent URL, https://ttraff.ru/wb?keyword=stanley%20cohen%20moral%20panic%20definition, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure suggests an attempt to manipulate search engine results or redirect users to harmful sites.

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=stanley%20cohen%20moral%20panic%20definition
    • http://rewazu.talkingtomyselfie.com/uploads/1/3/1/1/131164250/kazepufat_sularaxipajiv_vunasejikoxidi_kerusimunopavu.pdf
    • http://fuwif.magicrepair.net/uploads/1/3/1/4/131407089/675228fee4a8e4.pdf
    • http://files.samndoesart.co.uk/uploads/1/3/1/3/131398197/e6d212.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/7501172047.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/autocad_architecture_2019_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/9471218697.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/converting_celsius_to_fahrenheit_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/jolelisabijevijoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9140/1627/files/marvel_vs_dc_game_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/64375645163.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/zudavosujoxag.pdf
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/36941865402.pdf
    • https://cdn.shopify.com/s/files/1/0485/9373/1744/files/ancient_greek_homes_building_materials.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/16071751678.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_off000073ec.bin
a5d6ecf71685f46029df26024b609c47329cfa9270e49ed0c5bddf4a10578e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 5424 bytes
font_01_sfnt_off00008639.bin
b457deb7c34f5470b327ab686fbc7c1af3175716160a2a436c93b73093be4c7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 10240 bytes

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