Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46202df82f7ea88…

MALICIOUS

PDF

33.2 KB Created: 2020-11-06 01:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 702496fc42fb4d2395ca6f8377020dff SHA-1: 550cb63942dae85808352c7a9a8b55c5556f5e27 SHA-256: a46202df82f7ea887317bd53db6650383fbe23b67fa7ab997750d545edc4f8ca
94 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the presence of malicious links within the document suggests an attempt to lure the user to a harmful site, likely as part of a phishing 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=lds+teacher+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8ed8c985dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5f9ed95cea3d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f909c737dddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_5fa4777b017fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f9b86d1c9b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_5f9b2957808c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f8e5c517ef84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f936b2a84269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f90a16c1ed8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fa1045bd2562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f94e9c88f7e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f9c0e1da529b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8d8bee7d40d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_5fa479b170c8c.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/nawosineromigi/76620034756.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_off00004488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4488 5120 bytes
SHA-256: b9359d797e8bcf1ab9a0963bd33dfe1b1568c24ce172a318c296b562054fc1d8
font_01_sfnt_off000055c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C6 10156 bytes
SHA-256: e9cba09a37867b42b71255217b88627ea286868543a774855656e5fcd34b7698