Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3254319498d589…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 17:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9d4727de0f383cd1b8b9ac3aac0fe70 SHA-1: 3305893fd1577a8f253666f6fd53434b7b367cfd SHA-256: 5c3254319498d589eeba7c0adfd2745db9b011d509dc4f250ca90cd93b7a85eb
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, masquerading as a free download. The primary link, 'https://ttraff.com/wb?keyword=beginner%20english%20textbook%20pdf', is identified as a malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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.com/wb?keyword=beginner%20english%20textbook%20pdf
    • http://files.stephanieheger.com/uploads/1/3/0/8/130814687/bilemuvu-gipovik-befozorakono.pdf
    • http://rogafofiz.italianamericanclubofduluth.com/uploads/1/3/1/4/131437657/topejaruzuzufosajofa.pdf
    • http://sovusafav.kingjohnorchestra.org.uk/uploads/1/3/1/4/131453060/ropazojamepu.pdf
    • http://lotujof.stonegatekilleen.com/uploads/1/3/1/6/131606490/8c4fc9922eda289.pdf
    • http://files.edinboromckeanvfwpost740.com/uploads/1/3/0/7/130739835/978846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/jemazi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9046/files/brevet_2020_franais_sujet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/leatherworking_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/analytical_reasoning_solved_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/conan_exiles_starter_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/aieee_2020_question_paper_with_solutions_pdf_allen.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/streaming_data_understanding_the_real_time_pipeline_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/24161536869.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/carcinoma_papilifero_tireoide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/26004296584.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/davinonujonejirexaposeki.pdf
    • https://cdn.shopify.com/s/files/1/0444/5070/9671/files/atlas_of_anatomy_anne_gilroy.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_off00007884.bin
e888b85eea5db10bb909f64014409a6cc1131608f5b57b9b34a009486a6cebe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7884 5412 bytes
font_01_sfnt_off00008ae4.bin
76a669589f788529b354307ca7814245f18d91b08a112ae8753da67bbb3f2307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE4 10600 bytes

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