Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5040cacc7b7a529…

MALICIOUS

PDF

75.8 KB Created: 2021-01-02 05:54:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b5004e786a98da692ecc2e6ceab7702e SHA-1: db6a20f23ca0d1ca085437880d328944da60a20e SHA-256: b5040cacc7b7a5296ecc26338036b5ef549ee44551b1e0870c27888e9cfbdeea
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 'gettraff.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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://gettraff.ru/123?utm_term=geometric+patterns+and+inductive+reasoning+worksheet In PDF document text
    • https://cdn.sqhk.co/pitadewedobu/j04igie/notepad_compare_two_files_command_line.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/4ghkxic/fonts_for_instagram_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/UdWQzKJ/super_slime_ben_online_game.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/widuxade/85743291884.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/alban_berg_wozzeck.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/reporter_amharic_news_paper_sunday_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/balance_sheet_sole_proprietorship_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/sad_breakup_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/background_indian_flag_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/comic_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/her2_positive_breast_cancer_treatment_guidelines_2018.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_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 5704 bytes
SHA-256: db2c51b64e120e9452c3ab5f1633405f7c35e873d548e8a555b4290996d2c2e1
font_01_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 11200 bytes
SHA-256: d3010788628e6d20643997670be8a32890055fe76f38a100bacd3cbf6bb1e468

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