Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9374c3fa300fe3…

MALICIOUS

PDF

65.2 KB Created: 2020-11-25 09:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bd57eba831946c85cb7ed56e7db9514e SHA-1: 779727e59591d50f8b5a234c09a22770f3230375 SHA-256: 7f9374c3fa300fe39a951e5b72a1fa0da79ff29160e2603d7d3e400d2e218d67
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The ML classifier also flagged the PDF with high confidence. Although no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution 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://traffking.ru/strik?utm_term=communication+networks+llc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f91371ae4649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_5f9fbd2047975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1f8eb3-f50a-4369-88b3-d489ec9ae214/77538449699.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/damodarastakam_lyrics_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/translate_tagalog_to_english_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/nelujavuparuloj.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/mimejaturif.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/cake_dry_shampoo_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/corvette_c5_performance_packages.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/21878539973.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/comparing_fractions_with_different_denominators_worksheet_tes.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_off0000bf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF24 5004 bytes
SHA-256: 9eb2e3a37a4fb9112a9818a9872b0067b366a7e5cd25399fa670c487b3316ba6
font_01_sfnt_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 11908 bytes
SHA-256: fc7289f9b5412e5c166809b40a899404bb65a2b62475592712896b26d4a5f409

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