Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf2a0dd262d715f…

MALICIOUS

PDF

69.4 KB Created: 2021-01-06 16:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 605e411e6cabe916607cb56c105c8053 SHA-1: b162a222c616eaaa7d61f20644f5ff576e267f77 SHA-256: cdf2a0dd262d715f2b3f2149c9880a5a09e293cbc497a9d61c2bec6d508efe8c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/123?utm_term=3+button+suit+2020'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

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://traffmen.ru/123?utm_term=3+button+suit+2020 In PDF document text
    • https://cdn.sqhk.co/nomazotesi/chg1Ngj/80311143951.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/bzjd0HN/82756211371.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/jihgg2p/1447287193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_5fe6708d7e2aa.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/jaYih9w/student_beans_discount_code_isawitfirst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fc1bbe2b0e73.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/sfkgghd/learn_languages_with_memrise_spanish_french.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/gejeidO/72269925972.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/boxujetanonikuv/lonugiradavawesonu.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/sexanusanejapozijek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a315e458-ee8a-49fd-9477-bc56e81958af/proyecto_de_activacion_de_la_inteligencia_7.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/vufogetapurit.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/tamilrockers_ayyappan_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/estimating_square_roots_worksheet_answers.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_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 4824 bytes
SHA-256: e0fcc9675cfe868e3504b107ab20a7d709521de5ec50091dfb45b2a80d665995
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 9780 bytes
SHA-256: 344f491ce0eb9a0d784ec3370385a872f659a74e19d967d8ce691bd3e3a80de3

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