Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ea5b405a2088b5…

MALICIOUS

PDF

42.2 KB Created: 2020-10-04 17:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6281488309f18f72e2c41259dd9dd58e SHA-1: 423eb724344017174f5eb5614c1316f3f9d1d0fb SHA-256: b9ea5b405a2088b555067e1eeb9bc40f63b0daef601d43cdad54d8fc580c8f4a
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.club/pify?keyword=5+a+side+football+pitch+size+fifa In PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/25361024966.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/beromapamuvina.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/7044804734.pdfIn PDF document text
    • https://site-1038322.mozfiles.com/files/1038322/20463643467.pdfIn PDF document text
    • https://site-1037902.mozfiles.com/files/1037902/bimuz.pdfIn PDF document text
    • http://files.breathingspacecounsellingpractice.com/uploads/1/3/0/9/130969580/rururinotinoro.pdfIn PDF document text
    • http://files.explorecalco.com/uploads/1/3/1/6/131637419/9786575.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/c2bcf0f2-76df-456f-9f9c-7828a3a4e04b/24176482756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5d8442-f8f4-4852-8219-be1eb3a21bcb/72951072780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941ef0a9-f7bb-4773-bd43-b6aebcc87f4f/berozakuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9379/8298/files/julia_and_jacques_cooking_at_home_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6815/6825/files/binomial_vs_negative_binomial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8133/7506/files/smiths_santa_fe_cerrillos.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_off000066d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 5368 bytes
SHA-256: 1d7b26b12f05c3f538260b55cfd7741d8171a3e4e005cd5e63107171488eb714
font_01_sfnt_off0000791d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791D 10172 bytes
SHA-256: e2ff5e249a8058890f23e4fa0160dde26cdca3810df9a99008bf1cd46eb72f31

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