Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff9a1b60e641718…

MALICIOUS

PDF

48.3 KB Created: 2020-10-04 10:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d0e66a96d4c94f1b615c1e4ce0603529 SHA-1: f6c06f78f5dc5c414b68d97a5d09e04dc14ef4ac SHA-256: 2ff9a1b60e641718abb2c8f816a88c3cc90d6b91f3106faed3e44fc58d3f73dc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=math+worksheets+for+grade+7+decimals In PDF document text
    • http://files.styled4youboutique.com/uploads/1/3/0/7/130776268/veruvaxe_neboja_tuxuwevesarigix.pdfIn PDF document text
    • http://files.coloradojuniorcup.com/uploads/1/3/1/6/131606598/labiboduwi.pdfIn PDF document text
    • http://files.1817.co.uk/uploads/1/3/2/6/132681317/e457965e8c4.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/298061871.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/nomupavafalewomixoniwas.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/wasozekabexiroxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/971cbd22-692a-4559-9414-e97735431b5b/51789360937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0638a5cd-c9ff-4703-8ab4-706ad7505737/sadinozokiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c0d169-10ab-4401-992f-4e3b74353f49/galanusebadogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abe079d-d179-43d5-9445-f08406ae526d/46916678649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab0d5be-8bad-4bdd-9594-c9d8d51e28ae/zapeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4030/4023/files/notification_bell_png_gif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3819/4843/files/nelson_tractor_sprinkler_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/32574849232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/loreal_preference_hair_color_extender_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7019/6374/files/star_wars_painting_canvas.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA3 5676 bytes
SHA-256: 263b25f32150a3b540ca278af8ae3197518b5428afbea3969b7153a5d94b96b3
font_01_sfnt_off000091f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F4 10160 bytes
SHA-256: fa1d20825c557d9ef0fc3846a4540472be1ed3d3dd4a71ae659dc1df57db1167

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