Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad77c92e4316e0ba…

MALICIOUS

PDF

43.5 KB Created: 2020-10-16 05:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0e8da995bc4ee3382272943c0ef2afa8 SHA-1: 4f649ce8c7e923273f8e6965f667bf4571768c0a SHA-256: ad77c92e4316e0ba6e6d8809bbad2957fc0817d8b43c1e42e938c44476c80ea9
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/123?keyword=android+movie+4+me In PDF document text
    • https://site-1043453.mozfiles.com/files/1043453/97293976007.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/26573307264.pdfIn PDF document text
    • https://site-1039488.mozfiles.com/files/1039488/fifozikamu.pdfIn PDF document text
    • https://site-1042679.mozfiles.com/files/1042679/zarurem.pdfIn PDF document text
    • https://site-1042821.mozfiles.com/files/1042821/nudifier_download_for_android.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/tegigotuwi.pdfIn PDF document text
    • https://site-1038597.mozfiles.com/files/1038597/dufegatamipimagobi.pdfIn PDF document text
    • https://site-1042630.mozfiles.com/files/1042630/gotaxupikafagebepaditesu.pdfIn PDF document text
    • https://site-1039899.mozfiles.com/files/1039899/gomevixuxogojenamagapaje.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/gukefel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f88d34e30a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f86f556ca667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8722f695226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f88c76dae4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8713627dcdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f88e0bc2f3d0.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/bf3604b6-ae7d-47f4-bb7a-8700996daf8d/lodulawabipuxesozif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63329374-44ca-4e64-b86f-2546f9027664/6235682064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633df770-8ffe-406b-a6f9-4b87592d2ae2/zuvutofogedixov.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_off00006da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 4688 bytes
SHA-256: b402398a8a952d69e25977d6eb0ffefed386d41abc17747139efd0cfa3efb006
font_01_sfnt_off00007d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 10420 bytes
SHA-256: 893b4d3eb0f6450832dd9009eced2e5fc73c21bb7e3bb429a397d63e705d0610

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