Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f86973ebf792f9…

MALICIOUS

PDF

89.7 KB Created: 2020-11-23 13:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7345ca2f4df11ccbf8a362343ac4d060 SHA-1: 1414bcda6c814d78c9116ee3b74c062cd288e44a SHA-256: d4f86973ebf792f91f81531a2fd62bb0f42affb9c821eac96149bad65de93400
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://gettraff.ru/strik?utm_term=nes+legend+of+zelda+walkthrough, which is likely used to redirect users to further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?utm_term=nes+legend+of+zelda+walkthrough In PDF document text
    • https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/kejovifomatobifoki.pdfIn PDF document text
    • https://jujijojof.weebly.com/uploads/1/3/4/3/134353579/e5ced47f7988.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/kowevudakorigerisew.pdfIn PDF document text
    • https://basalulonow.weebly.com/uploads/1/3/4/6/134612360/3ae843a559dbcc.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/9448479.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://s3.amazonaws.com/mupukesunobaga/8th_grade_math_placement_test_california.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/football_game_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/cv_template_doc_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/borderline_personality_disorder_nami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b04c11-4c99-4842-9ac2-3f9bba7bed99/74128729158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d80951a-3909-4ca2-933e-58cb9cc753f3/97530852129.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_off00011482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11482 5176 bytes
SHA-256: 97395a220886abb95be735f1dc513878c9ac47b0e54ff7b6633344afc9ea8ec9
font_01_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 11064 bytes
SHA-256: 9f8ae364a5a2685e52fdb01479a895e4a18506e9495e5923c598e2d0bd523168
font_02_sfnt_off00014c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C18 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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