Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c9a30ab6fb1c49…

MALICIOUS

PDF

72.4 KB Created: 2020-12-02 02:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f35b96c2f00035c83d57a508bcc3df10 SHA-1: ba8146af2c7538726b58940bd3348009dd2143d1 SHA-256: 57c9a30ab6fb1c495122a0acc8d31582b43c8c725fe49821b59ba47d071702e3
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://gettraff.ru/123?utm_term=10+ball+rules+youtube` is identified as a malicious redirector. While no scripts were explicitly extracted, the nature of the PDF and the malicious link suggest an attempt to lure the user to a compromised site, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=10+ball+rules+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5fa453c3a976d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f9cc12ded5b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fb51d89e650b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/27785610571.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/43324510186.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/exercicio_adjetivo_uniforme_e_biforme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4beeac65-5c0a-4d15-9e3e-7fc939d1867b/salutimobibijofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f2c8fa-4916-4946-8d24-f21f91cfb055/blue_ring_zelda_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6063ecb-803f-41ce-b6d3-1b5b23d4e0cd/casio_g_shock_ga100a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/pittsburgh_film_office_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/brother_louie_98.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/76007872570.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/artist_profile_template_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e57ea0-dd24-4922-93bc-7214c6339a57/jessica_valentine_md_plains.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_off0000df49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 5020 bytes
SHA-256: 5fd687eaf2b92c4554d9b259808f43145c20d1db7a8739fe820331a94fd6334c
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10704 bytes
SHA-256: 9e41de78b61391756044ef32934cdd929d153c35f366b5059ae441c02ca89ec7

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