Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bae56ce20c2280…

MALICIOUS

PDF

47.8 KB Created: 2020-11-05 01:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5f694ade5d8e22f5a109ca146e39be08 SHA-1: 76cb7fd24170da958c0b862c5553bad62a9d2cd3 SHA-256: f6bae56ce20c2280d0751a754b5fd609f989ce2af86ab469f60bbf2fb78b3d16
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is likely used to host or deliver a malicious payload. The heuristic SE_MFA_LURE suggests the ultimate goal is credential harvesting or MFA abuse. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware delivery attempt.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ggtraff.ru/123?keyword=ram+build+sheet+vin In PDF document text
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/1266094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f875c4fcbe71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f91364d8e727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f94d3dde3545.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5301197.pdfIn PDF document text
    • https://tazusarativiwu.weebly.com/uploads/1/3/4/5/134510609/gafagazekinebiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5f91a71936d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f91ddc04800d.pdfIn PDF document text
    • https://jalipixax.weebly.com/uploads/1/3/4/3/134340191/c01f0620c3a95.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/5fc133f9-5836-4c23-a8ea-9a1d1a38f881/rubosizabovawum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8356724a-73ae-4d06-96ea-7c45041e187c/70363527213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1c9ad6-d597-447b-8182-c6a3652d1597/xunamajuzaserilal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11de7705-b610-423c-8000-7fc1ab6de608/81541423300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7e9ef4-60d9-4e6e-9f46-a9404c832de9/71031089155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d07dbf-c69b-40ea-b9cf-f4c26a9184c7/foriwalovuvasoxasizu.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_off00007dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 5176 bytes
SHA-256: a5ce99f221465ffabb415e61fbefb18dbf29329b2ca3b61844438ed9e4244491
font_01_sfnt_off00008f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F37 10500 bytes
SHA-256: d77625e899654d332079259de3c5243816a9ee50309a0756ba0fea310c5c141b

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