Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf802de8486a6fe…

MALICIOUS

PDF

79.3 KB Created: 2021-01-14 05:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b214551236b1a2ab0a2bac4fdd638ec8 SHA-1: 31ff150e71e2c3bc05cb61925f7f02e46408f32b SHA-256: edf802de8486a6fe2cd5b345a091e72851480774fd9548abd4929ac098008d27
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 'https://traffine.ru/aws?utm_term=anglo+saxon+riddle+25+answer'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also flagged the PDF with a high probability of being malicious. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=anglo+saxon+riddle+25+answer In PDF document text
    • https://site-1174092.mozfiles.com/files/1174092/bakers_deal_of_the_day_november_2019.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/sijamadiw-sudidulaboxipo-nemotivo-vedupevaxinotu.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/tuwokirobuv-dazudixilenu.pdfIn PDF document text
    • https://site-1176202.mozfiles.com/files/1176202/zopuworunudigagexedapuzej.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/sixenogafopoj/account_coordinator_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/university_of_michigan_endowment_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/55307222161.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/zamopijiwiru.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_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 5400 bytes
SHA-256: 45113b4df1452768c0d05f3b3128d7ea861afb764561e56eb4202defa8afebe6
font_01_sfnt_off00010a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1D 11036 bytes
SHA-256: 3e596152a1a8b563034d26b1ca9c75151311381a1c4c7107304003758a73cdc4

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