Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5c6158e273b57f…

MALICIOUS

PDF

74.2 KB Created: 2021-01-11 11:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c2946cbebe3f9b87060d7163c00e5d7e SHA-1: 79a7e0a5863b1e03632811f88ea8ffad513a3684 SHA-256: bd5c6158e273b57fd2e65e600a72447d1c31805b329f8bd3e9c8b62d093204b4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/wb?keyword=hockey%20jersey%20frame%20canada', is the primary indicator of this malicious activity. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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/wb?keyword=hockey%20jersey%20frame%20canada In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ff01dba4251c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_5fe4935912e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f873d2c3e384.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/58108292293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404529/normal_5fb372c8503c1.pdfIn PDF document text
    • https://site-1172655.mozfiles.com/files/1172655/best_free_piano_lessons_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_5fa93be95426f.pdfIn PDF document text
    • https://site-1168222.mozfiles.com/files/1168222/clash_royale_clan_wars_2_sucks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fcb7bb5cc0ec.pdfIn PDF document text
    • https://site-1083673.mozfiles.com/files/1083673/factors_of_production_in_agriculture.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/fakuguvil/read_excel_python_sheet_name.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/lobatifekijipumo.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/guideline_congestive_heart_failure.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_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 5340 bytes
SHA-256: 4fc859d297e15ad20d339a2719d7145b1cdad0a50bf19f7f17d686a437fde209
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10696 bytes
SHA-256: abaf5fe267df09af407166ab12a2e67ad1f2888ea565f644357edd968930c13b

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