Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a00999077a90917…

MALICIOUS

PDF

66.3 KB Created: 2020-12-15 20:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f9f50b371ac71c69ff8f4f28d5d54350 SHA-1: 5a7016be38a61d18bfc4701b0f066bf3fa69cb9c SHA-256: 3a00999077a90917ae406b59bba28c43c342787dae4be65ed9605fd6955203aa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely part of a phishing or malware distribution scheme, disguised as educational content.

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/123?utm_term=english+grammar+basic+notes+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5f9b091c66793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fcf240718f70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd639a580290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fc0361e35309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5fa780b4604a7.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/lesepapusojifax/living_clean_the_journey_continues.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/62399726765.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/arijit_singh_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/fejap.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/ames_test_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/rexufawedixadak.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/ambulatory_clinical_informatics_specialist.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_off0000c77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77E 5668 bytes
SHA-256: ca0ed93588f50155636563ebf66558bfe17f93577663396b837ccd1067e18533
font_01_sfnt_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 10020 bytes
SHA-256: a6eecd547f03e97853053196235c19d3e49a65b09952db00708e392751625010

Open this report in the interactive analyzer, or submit your own file for analysis.