Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cf630488f07f84…

MALICIOUS

PDF

73.2 KB Created: 2020-11-02 23:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 734916caf300fa926dd261371eed63be SHA-1: d2b99bbc380a1df75b1f349bda1a070721b235d0 SHA-256: f6cf630488f07f843e23e1f4121522765abfd27c64453a6da88f29a76e5ba6f5
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.ru/pify?keyword=my+fitbit+charge+3+screen+went+blank In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8e36954bafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f93ebabc4a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f89dd3cab136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5f9e65fe8cd3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5f9bc9849ea9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f9240c5bb9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f8ba9a3f4034.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/335340f6-f9ae-4936-86fc-f3aa60f108ab/sewuzoguponeruredinoboxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dc27f6-4dbf-4d7c-85d9-0c8b451f9a96/cerise_hood_spring_unsprung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee32e5cc-5584-4c8c-9911-8ccba72d175a/tudarusegeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb91e2d-6fac-4c68-922a-fcfd8aa8c598/wulozikumilexeziwaziva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd8a1a0-14cf-4e35-9859-90473060f5f7/xemuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3a3ac7-c906-48b1-b001-1fc9b7334a15/kumepufazaxoluwaxodikivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f839f772-7204-467d-977e-0c25839d58c4/23568064114.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/judetulopix.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/93648095558.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_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 5708 bytes
SHA-256: 5ed6293bb886fd7dccb184c0e838dddf021fd42af31ca53c03dc471f1eec981f
font_01_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 10368 bytes
SHA-256: a181177d7156f67ded54b0a682f3d2e549935937954655d84f15fe8df3c99c83

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