Malicious PDF — malware analysis report

Static analysis result for SHA-256 62922ae355e9262e…

MALICIOUS

PDF

41.9 KB Created: 2020-11-03 19:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8faa856f004e738c8479377996d7a87 SHA-1: b35bc92929ea4e07160c9b061c7d2740983fec49 SHA-256: 62922ae355e9262e9247954eef7a35c98838cc9d954002e3bbf8d2127fbbed6f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content farms. The primary URL, 'https://ttraff.me/123?keyword=helm+publications+owners+manuals', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be part of a link farm strategy to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.me/123?keyword=helm+publications+owners+manuals
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5f9ac320c6383.pdf
    • https://cdn-cms.f-static.net/uploads/4374380/normal_5f8dd9be98126.pdf
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f8a33c1dfd99.pdf
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8e2ae949057.pdf
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5f9a69385aae2.pdf
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/jefabego.pdf
    • https://tumovapexawezan.weebly.com/uploads/1/3/1/3/131398362/6beb8d8a2c3543.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jifesu/boston_university_campus_map.pdf
    • https://s3.amazonaws.com/befarekogol/76401366229.pdf
    • https://s3.amazonaws.com/tizowodifi/court_officer_exam_2014.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006369.bin
15fe1480bb85ca1e7cae5b73d4c9c9e980bea478e394d56e494bd415622a7482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5272 bytes
font_01_sfnt_off00007546.bin
1445aa01e593fbacc21e7bf9a7715589ccd8c322b30a7a55f9c70545d2443796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7546 10920 bytes

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