Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bab39214e5a7891…

MALICIOUS

PDF

42.0 KB Created: 2020-10-06 19:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9a98c2e10a75be3656c519ed842e2bc1 SHA-1: b2952d3334d09113b4e6d0f02566e873f9101746 SHA-256: 3bab39214e5a7891908effdc4096cc98a5d13dbd89bd1ae50d6959554f6b1819
124 Risk Score

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 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://ttraff.com/pify?keyword=vegetables+chapter+15+study+sheet+answers In PDF document text
    • https://site-1048530.mozfiles.com/files/1048530/posupo.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/79168983050.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/94264104617.pdfIn PDF document text
    • https://site-1041672.mozfiles.com/files/1041672/kejusupuwaresew.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/lagavari.pdfIn PDF document text
    • http://vekabivat.danberkey.net/uploads/1/3/0/9/130969600/5ff9bcbd11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9272/3862/files/case_studies_in_abnormal_psychology_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/79746601184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/flow_cheats_daily_puzzles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e66b9b-180c-489f-8119-e97c0b2a5549/22745787297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2123bad-4975-4273-b9a6-fe2007e290b6/85239869665.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_off00006402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 5812 bytes
SHA-256: 28d45263cde67021f4fcf2fa1a9096b3961b74228757a582733cb4ee5a9a70df
font_01_sfnt_off000077e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 10272 bytes
SHA-256: a39c6784704b20168348706f53ff0edcc58a23794e9e330f547182a2fa13909a