Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ebb31b1e77f3ce…

MALICIOUS

PDF

67.0 KB Created: 2020-12-09 15:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 346a990f0ebcc946f37a82ed84146848 SHA-1: d0e34f7a32d177af6c44953787ca5069cfc20d5e SHA-256: 99ebb31b1e77f3ce8f7ae6bbcc82c4b8e79bf4c1a1914c2eac113c767844f7df
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is indicative of phishing or malware distribution. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=miraj+scintel+and+anakin+skywalker+fanfiction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_5fc34edb92202.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/d1a541ad-ba38-44b1-b7c5-c55574a85f4f/xuvib.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/stand_my_heroes_anime_news_network.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/balon_gastrico_complicaciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5d9b4a-c0c5-4793-a5c5-245b3f3a87ed/kugatoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afecff8-a54e-4471-802a-5a0442517ca0/a_plague_tale_trophy_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c256a3e1-c4e2-4779-9929-e5cafad59885/25346914401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b14a29-e503-4a06-8b6c-72f384eec097/75246059245.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/vegimivumutasaxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe2313d-ae14-4715-8f44-a017c9faf20a/xivekok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5165ffda-1cf1-4aea-8150-71ec2a4ef012/55884776838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64105201-52f8-43ad-a5b9-bdc84c135a62/44907715028.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_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 5352 bytes
SHA-256: 2429d17aedec08abd6fb60802fe6337f74c5463d95a20777fe8c76d3e5249c2c
font_01_sfnt_off0000db1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1F 10608 bytes
SHA-256: cd0ceed10e8e73fa4a3cb147d8afec1744a2e4d25529fe4854cdcca1277ca56e

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