Malicious PDF — malware analysis report

Static analysis result for SHA-256 6236be2794121247…

MALICIOUS

PDF

52.3 KB Created: 2020-10-15 22:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8ca7eba4c7dcbf802ff29b0381ebf700 SHA-1: 926670e2cb906d91ebf74ed2eb87fa9bd0bcd82f SHA-256: 6236be279412124757fd65839946b05fa716e729acf68eefc923ed08f231909f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, disguised with a search query. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to drive traffic to malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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+emulator+for+windows+10+small+size In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8743a9ac3d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f88687fe61fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f880dd1e97d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f88119162280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f8777b63b239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f870c3b40779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8836aa91d35.pdfIn PDF document text
    • https://site-1041677.mozfiles.com/files/1041677/36943951426.pdfIn PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/boxijemupimujivutamexeb.pdfIn PDF document text
    • https://site-1039330.mozfiles.com/files/1039330/73464257156.pdfIn PDF document text
    • https://site-1038982.mozfiles.com/files/1038982/47873702464.pdfIn PDF document text
    • https://site-1040180.mozfiles.com/files/1040180/turbosmart_t_manual_boost_controller.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/tuberokaxe.pdfIn PDF document text
    • https://jurizimobijagi.weebly.com/uploads/1/3/0/8/130874317/c67a1b51b43.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.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/1/0502/9022/9413/files/arnold_schwarzenegger_workout_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5603/2665/files/2164218014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f8f7bb-b19a-44dc-8bee-33ef47c3cf25/disel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c74978-c53e-406f-bb0d-fcf37f72a765/gifiganokiburubom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456edf68-f6f2-4fe7-99a5-70f6c38a4b4f/6537574933.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_off00008e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E28 5376 bytes
SHA-256: 46b530455e5324c022c4da7bf628355253a15f5508ef7ceb23f9c51ccefcb80b
font_01_sfnt_off0000a06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA06E 10364 bytes
SHA-256: 005f5f1fa7f7751ae1e5baba9633752147f878b6e6eeca37b2b519f10c6e22e4

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