Malicious PDF — malware analysis report

Static analysis result for SHA-256 1259163ff3ab3263…

MALICIOUS

PDF

80.6 KB Created: 2021-01-12 19:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 00773b0398a0529cb55d6839b0e3e9d9 SHA-1: db74352174692320c00a3c42dd9b29f74c7f1a35 SHA-256: 1259163ff3ab32636f776dc3ce51e977e839736d30c1e0fc79e00e4871985718
124 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The document's structure and link distribution suggest it functions as a link farm designed to direct users to potentially harmful websites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=ray+bradbury+october+country+pdf In PDF document text
    • https://site-1173526.mozfiles.com/files/1173526/27776736498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fc54cd04a57f.pdfIn PDF document text
    • https://site-1233125.mozfiles.com/files/1233125/business_impact_analysis_summary_report_example.pdfIn PDF document text
    • https://site-1171826.mozfiles.com/files/1171826/tech_geek_synonym.pdfIn PDF document text
    • https://site-1177340.mozfiles.com/files/1177340/madness_combat_sound_effects_download.pdfIn PDF document text
    • https://site-1168300.mozfiles.com/files/1168300/triominos_free_online_game.pdfIn PDF document text
    • https://site-1175422.mozfiles.com/files/1175422/kemoxituvaxovoj.pdfIn PDF document text
    • https://site-1171574.mozfiles.com/files/1171574/home_free_music_download_online_mp4.pdfIn PDF document text
    • https://site-1219965.mozfiles.com/files/1219965/dmt_trip_report_breakthrough.pdfIn PDF document text
    • https://site-1178770.mozfiles.com/files/1178770/kelasopimedinofime.pdfIn PDF document text
    • https://site-1176918.mozfiles.com/files/1176918/bizexunovozupurilur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467027/normal_5fd63913eea05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC9 5188 bytes
SHA-256: 5bfd41e38ed0da9cefcaf00d9c6c4d90c791da37ffc0b4109dcef6d192576dfc
font_01_sfnt_off00010f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8C 11076 bytes
SHA-256: 1e0a5f54b4152f111ee9229c884d5ac185c88ef10e8cab6f0e1423481b9b75f5

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