Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bcb061712be363…

MALICIOUS

PDF

35.7 KB Created: 2020-10-09 02:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1dc32ff443ca54dd7eecdf71edf17d9c SHA-1: f4112d360478bfddce27433cc2339ad44b9f54c4 SHA-256: e1bcb061712be363710c91fccdea8143ad3a4329759569c6835e1cb1e0bbd3d8
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.me/pify?keyword=geometry+worksheet+angles+of+elevation+and+depression'. The document body, though heavily obfuscated, contains similar text, suggesting a lure to educational content. The presence of multiple links on disposable hosting further supports a malicious intent to redirect users to potentially harmful 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=geometry+worksheet+angles+of+elevation+and+depression In PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/viwizexejitikiza.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/xerofixuwibozerovase.pdfIn PDF document text
    • https://site-1040521.mozfiles.com/files/1040521/93024009113.pdfIn PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/62918928865.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/87231636305.pdfIn PDF document text
    • https://site-1039793.mozfiles.com/files/1039793/9706372600.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/wupazat.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/jogopufini.pdfIn PDF document text
    • https://site-1040244.mozfiles.com/files/1040244/2926239238.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/e7afeabc-cfb2-405d-908d-1a2a720886b7/34597799390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9b103d-b31d-4294-8e4e-191b5603dfd1/40546276908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0800dbc-2235-4e0a-82a5-29ee07540001/mojowanune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2debd4-9601-46d7-95f0-a03a040e014e/29384548991.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_off00004c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C9E 5804 bytes
SHA-256: 2b1338bcb3e9316965076b76e8a4206ec7b9cda61952d4203919f07678322156
font_01_sfnt_off0000605a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 10024 bytes
SHA-256: 638e2bedf8b13ddc0912a9fd8b307e692db01aa21c5cbfb2aa1f3dfaf4e3440b

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