Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a75b73579f51ece…

MALICIOUS

PDF

41.1 KB Created: 2020-11-02 09:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9fdca9186350b052118a04b2f3486730 SHA-1: 2fe8e20aa8cf5a80de6bbae75ced9411db304ac1 SHA-256: 6a75b73579f51ece385a8f9c65e4cd5f07d114a9bb7c6349c8a0daf25ef28660
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=ffxi+food+effects+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f8e190dcb61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5f9f97ed6adfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8a5ba817fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f9f386b269ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_5f95e2826e32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_5f9da38d39b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8742d7389d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/nigakabozudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8166494f-5c5b-400a-846b-f6e53a624e06/87762903579.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/selatagiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/iam_751_boeing_collective_bargaining_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/limolikepabudewovipugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c0a68f-ddc1-437a-ab6f-e0fb52db69de/pidezukokimok.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_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 4876 bytes
SHA-256: 2f116920611d34f0bca4a7fd9aa886ac6fdc901c4cb55a6b63089ef853834359
font_01_sfnt_off0000721d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 11072 bytes
SHA-256: 19d27ed5fa8915a0e85a0fb5de5f8f64d515eec9df8531a7793543d150df3727

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