Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b14be8b736fdbc…

MALICIOUS

PDF

44.3 KB Created: 2020-11-01 06:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8581826a4c3e9eebcd4dbf8c574f37fd SHA-1: d742fb466ce937663c04497102bb4811e6f092ef SHA-256: e4b14be8b736fdbc6a913935912cc444f3b7ed8040d23ad5578012aa834f2b19
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to "https://ttraff.club/123?keyword=mario+flash+games+unblocked". The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to this malicious site. The ML classifier also strongly indicated maliciousness.

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.club/123?keyword=mario+flash+games+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f8b09a8a4797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f90bc497b0c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f94b631d56b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f964926bab10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f978ab2e1e5d.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/6960081.pdfIn PDF document text
    • https://lewonodi.weebly.com/uploads/1/3/4/3/134330754/pugufujamibetudoban.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/8477436f-e561-4860-ac49-b01bfac9218e/nuzifipirosexezemosupim.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/lidobemubijezagopowagemaz.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/mukolosopomu.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_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 5644 bytes
SHA-256: e4a637ccec0b395c52880bc06f6dcad562a17e0e077f20e9ca36832a35af2936
font_01_sfnt_off000080ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AE 10692 bytes
SHA-256: 9677628f9d9f7b72dbfddabca2a83b3573a30cd3e34ebc21a5a56a6184db51f4

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