Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd38f73138a61585…

MALICIOUS

PDF

34.3 KB Created: 2020-10-17 16:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d9d8f8c7b45e1d2b9c319097168ff1c1 SHA-1: c4b856b41b82bde3b7cd46077f27a107c2bd1499 SHA-256: dd38f73138a61585217d5aceea1accfcbbe5ae303cddd52e9078f925961d4c22
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.me/123?keyword=jellies+the+life+of+jellyfish+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8d7dd3a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f8976f71f3e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f8ab1d05d24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8aac34a92cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f8a890ce2f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f879e53422c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f88b675a7c32.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/6869492.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2737601.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/pojesotarawo.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/d7ac14aa-f335-42c5-a7a1-cf8c5beda6b6/wamekovavobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c00eb7-f0fd-425c-900f-a6b18b05d1c8/72985317888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ca3cc7-0073-43c0-8812-176d97320447/falupiforavako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75a8741-16da-4ef6-816e-9b4e01ca7e9e/91297342000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/dodojuvopuvawujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6473/3079/files/diesel_power_source_turbonator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3717/9042/files/royal_seas_cruises_grand_celebration.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_off00004973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4973 4992 bytes
SHA-256: 3436209e5b45e983fb8f4c38bbffcdad3af4bc63b6373c115b6fdef7ed202ef1
font_01_sfnt_off00005a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 9800 bytes
SHA-256: 5ca29814a550c6ba76755b3c07073c6ee9d9a488a10684658113a6b87116705f

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