Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9354f0d8485d5ce…

MALICIOUS

PDF

34.1 KB Created: 2020-10-30 02:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d82e30168d03d4dbc295604e92db5f4d SHA-1: 1b241730c3da518a8da76b02b3cc91a47314c449 SHA-256: f9354f0d8485d5ce6c62bbb9fe6ff80126df8585673fa92eaf9daa1568b41b77
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=battle+of+ohashi+bridge+tips In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f98a511897f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8a140fa749e.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5f93380d9f325.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/bce02ee1-4491-4bc5-8966-86f18338c9ce/95096763401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c75f52-bce7-4b68-8455-2c875d57a527/sevofufeluxitenowori.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/24091891017.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/73391847686.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/blackboard_collaborate_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/546b6959-d97b-4bb4-84d6-6f6a48ba0544/88862992661.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_off0000472e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472E 5492 bytes
SHA-256: e502a8e204d7867d6aa4e85a7172acee82cf64b59004e9d159e8cbf2e6a4fdcf
font_01_sfnt_off000059d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D3 10104 bytes
SHA-256: 56e1bc80a8228d777d6bc1bc3ef315b2d99379a8a97e147167db652f229e2491

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