Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b13e0e99a943eda…

MALICIOUS

PDF

88.2 KB Created: 2020-11-09 09:30:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8fbde0a94aa1fce9990a8541c888ad8e SHA-1: d6e872bbd2405b3985be481854ef3567b6640117 SHA-256: 8b13e0e99a943eda7143756d8aeab78bf7e6c29bcf3de61c3e2c9d58ec0d376b
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffine.ru/123?keyword=history+of+osseo+mn' is confirmed as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL strongly suggest an attempt to lure the user to a harmful site, likely as part of a phishing or malware delivery campaign.

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://traffine.ru/123?keyword=history+of+osseo+mn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f8b17aaafc8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fa6eb35b6619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8c4b9803e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8814c478d42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bevelokoli.files.wordpress.com/2020/11/votojejizi.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/fundamentals_of_electrical_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1ec6b5-0cfb-40bd-9a80-7e4eee25ad42/the_lean_muscle_diet.pdfIn PDF document text
    • https://zuzoxet.files.wordpress.com/2020/11/lowokotanibutelol.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/56403158534.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/beltenebros_gratis.pdfIn PDF document text
    • https://bikulaw.files.wordpress.com/2020/11/bajekupexu.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_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 4732 bytes
SHA-256: 03ab7632d15b25920144c7a792555bb41f14b87518076dcc95276d959f1dc3cf
font_01_sfnt_off00011f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F50 17292 bytes
SHA-256: 01d11d92f49809c497da1e71bcd046b8a51b56b07574dada66895463d188cae6