Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0a7fe9dd322a32…

MALICIOUS

PDF

45.2 KB Created: 2020-10-02 20:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: babad4dc86de3d9334c724b2e5378d08 SHA-1: 7bc9b41256aab51022f98bc21f478280be8fd446 SHA-256: 5f0a7fe9dd322a32eed33e68afe4f3979014685b3475305075616246bcee183c
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://ttraff.link/pify?keyword=models+of+yesteryear+price+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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.link/pify?keyword=models+of+yesteryear+price+guide In PDF document text
    • http://ragud.mtsarmusic.com/uploads/1/3/1/4/131406449/4836636.pdfIn PDF document text
    • http://buzadagav.servantsofjesus.net/uploads/1/3/0/7/130775365/7865102.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/27963018217.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/tavanoki.pdfIn PDF document text
    • https://site-1038488.mozfiles.com/files/1038488/ronularewikuw.pdfIn PDF document text
    • https://site-1038402.mozfiles.com/files/1038402/bukipix.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/gijemikef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/54761860-0fc4-4eec-82d4-820443cbf47d/nopelefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2a70ff-862b-441c-9ac7-9f8da12dc80a/xebenedajibupanosef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac79602-cc7a-493d-b4fb-9c5fe7460b57/kikusajojibujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7751e6a-a53c-42dc-8a32-4b83af5ca87a/54812682171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764b6118-2494-4545-8e9e-e8b5d8c18e17/61869518962.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5208 bytes
SHA-256: ac6db30b4d5398b86b34155c398cb15e872df70de46d1553ac70c05b1814d33b
font_01_sfnt_off0000769f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769F 10512 bytes
SHA-256: fd1b4ee7ba812a6fb82b698f967603396e8553781eb4ef5d50a3f4ad1763a1c7
font_02_sfnt_off00009a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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