Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe51b032f12a7b…

MALICIOUS

PDF

43.2 KB Created: 2020-11-03 05:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9098177639cf97ef3b036cf0492f0b6d SHA-1: bdb86460cebf5ca66d9ca7b17fc7b01d7789d9dc SHA-256: 42fe51b032f12a7b6473fbe98e9667afda0943338b0ef228cb32db1f3d7429f3
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/123?keyword=the+rap+year+book+pdf'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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.cc/123?keyword=the+rap+year+book+pdf In PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/021d9e4e9f.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/xedet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fa0a3cb5a980.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fa034687314f.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/varolexexus/pafifajikuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b056f0-96a7-4d75-b04a-df172d446c27/mevijir.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/espectroscopia_absorcion_atomica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aecb2ebb-5431-4202-91dc-d0995da27d55/similar_triangles_review_worksheet_answers.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_off00006d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 5172 bytes
SHA-256: 7831ac5dd26e105a7a26d342ba1e79fbb5e518023cfe4e6da98cef07e433381b
font_01_sfnt_off00007ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC4 9868 bytes
SHA-256: d20383adadbf78ef3b81ca41e2cee230f16b30d70cfbb013ef3c285249d7dc6f