Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5b6a710c2c7937…

MALICIOUS

PDF

44.9 KB Created: 2020-10-02 21:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 44c94a835e9de7094c4bb8313883bcb3 SHA-1: e9652f7ec3f1fdfd506420647c86717d46b0fe76 SHA-256: dd5b6a710c2c7937e3cad2428a14e14545018cfcc9752009abe1419ee7ebe966
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://gettraff.ru/strik?keyword=%25D1%2582%25D0%25B5%25D1%2581%25D1%2582%25D1%258B+%25D0%25BF%25D0%25BE+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE%25D0%25BC%25D1%2583+%25D1%258F%25D0%25B7%25D1%258B%25D0%25BA%25D1%2583+2+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D1%2582%25D0%25B8%25D1%2585%25D0%25BE In PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/93619840378.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/rupolekifobujupiwajolude.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/53116362485.pdfIn PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/95175508923.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/rowefomolirowa.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/jagimutijuzedi.pdfIn PDF document text
    • https://site-1037894.mozfiles.com/files/1037894/34490323560.pdfIn PDF document text
    • http://files.robbimae.com/uploads/1/3/0/7/130776344/235016.pdfIn PDF document text
    • http://files.montaukbeachbungalow.com/uploads/1/3/0/9/130969494/razefoki-davugirexixura-nosojunovifo.pdfIn PDF document text
    • http://files.missionalaska.org/uploads/1/3/2/7/132741555/wubomewitasole.pdfIn PDF document text
    • http://files.hooponhoops.com/uploads/1/3/1/8/131871414/xigigalaniregi-kalibifokara.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/1/0483/7919/9648/files/hip_hop_shirts_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1008/7317/files/justin_gypsy_boots_l9909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/fuwofudezubasemela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/human_body_systems_worksheets_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/chemical_engineering_pe_reference_manual.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_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 5904 bytes
SHA-256: b235b5939759cdc1d6906bf2d65643e69202f436648ce5a05828da3acac935b0
font_01_sfnt_off00007808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 13836 bytes
SHA-256: 22c67b8c2a52a97d7d8ce965e31c2906862b8ecfce7cff7d2f6ec681016ce4e4

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