Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4976155b5fb781b…

MALICIOUS

PDF

45.3 KB Created: 2020-10-25 21:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 15ca0846acd613efd0c9ad997fbaebc0 SHA-1: 9c30cfc4536f02058b63de516063a7eb9481d903 SHA-256: e4976155b5fb781be18b5ba6cb6cae709ee1816d460205d454694aa4fa38f2ff
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://ttraff.me/123?keyword=money+word+problems+grade+5+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f9565000f831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f9007ea10bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f8dde5b92215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f885f5948701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f88e6a0e6f47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f89f7749437f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8c9a0138e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408720/normal_5f95686e18b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f8c688260aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5f8be448bc55d.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/de7bba1.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/guwaderenel_linufevoroxaf_guzafosone_jodavoxiveb.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/kigonulobutuxef.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/lafemude_faruju.pdfIn PDF document text
    • https://xumogaveranowiw.weebly.com/uploads/1/3/4/3/134371782/linesudukud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejados/digimulexuzum.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/anti_gravity_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0313ea4d-e7fd-4e35-b900-4f321a1ec8d6/ximipuligipezitelikajotag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbcea572-34a6-4e63-ae42-c34614fc55b0/tafiba.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_off00006f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F13 5824 bytes
SHA-256: 799a15abac933681f331b5a82ce9bd199303665843732e7ab46df4b578c9330a
font_01_sfnt_off000082e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E7 10872 bytes
SHA-256: 6de48c223b280120e7b0c9c9cc8c7ca8f800f0acc43947fcc1ae9ba55d95e79f

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