Malicious PDF — malware analysis report

Static analysis result for SHA-256 e915f66e75e48a0f…

MALICIOUS

PDF

44.9 KB Created: 2020-10-31 11:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7af12106d2d6ae4ca5f207068b5f7d27 SHA-1: 7c30ba11cfe3e32d78ccb1d11b2a135f940c2b7e SHA-256: e915f66e75e48a0fe54e9235e881b45bb753300dc02a1e1945ba011c8d703a8d
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the critical heuristic firing suggest this document is designed to facilitate malicious redirection, 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://ttraff.ru/123?keyword=w%252Fv+meaning+science In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f9d0f833ad9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f89f984a858d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f9b1bbd75ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8cf3636b399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8807932a096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f8b8467ea515.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/aeda289f-063d-480b-9028-3caabc174bb9/36947789127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e85082b-ae5c-45f1-b9f7-dbf3ba6e188c/baldurs_gate_2_enhanced_edition_throne_of_bhaal_hexxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f52be6b-9bc3-4b05-8556-cf7557b94bea/moguzirebanidedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9aae01-20ce-4985-b3f0-792209d96c01/69202097425.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_off000071df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 5100 bytes
SHA-256: a358cb38740124252856bbcc54572d9fd60b671f6199aa041007dbcbcf9ccd3f
font_01_sfnt_off00008344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 10384 bytes
SHA-256: 95d9f8d1288b0ca65c858ee80320eb099660baf9632a404fe07aa78f57a66803