Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a544f48869c8c24…

MALICIOUS

PDF

66.6 KB Created: 2021-01-17 06:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b03ea9d556a575ca4c2e07a0658912bd SHA-1: 94d3e897dc4f5ed1edf3b3e8e29b68ca54a2f464 SHA-256: 8a544f48869c8c24e49f98079bd3e7682a7c4891fc2a3757836a4f1137677018
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://traffine.ru/123?utm_term=lyrics+to+clean+by+natalie+grant In PDF document text
    • https://cdn.sqhk.co/rilowikapaz/jhc6jc7/xoparuwoxikimegipanaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5fbf2a1be6dd6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/jhd99db/poboy_shop_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rujimidujek/kixoxoridimaxajozeda.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/crystal_reports_runtime_13_msi.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/leadership_styles_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/wovekabiv.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bncc_na_educao_infantil.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/27678143798.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/brain_teasers_for_interviews_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/bus_philadelphia_airport_to_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/blackberry_z10_autoloader_10._3._3_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/noxalurunedujo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD53 4940 bytes
SHA-256: 5a8db97455f576baf5c740adae04f12404e5caa256b1af55793392a89e7c62f4
font_01_sfnt_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 9772 bytes
SHA-256: a147d2701083986a4ba81d6a88e1eef7c17f5b1985402404cb1d3233f56e5433
font_02_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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