Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc737b1eb77682b…

MALICIOUS

PDF

101.0 KB Created: 2020-12-22 14:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 12b3b9ed18cc78136c238414cd8fb891 SHA-1: 9678ea9ed6e41c23d43a7927283bfb096b8de0fd SHA-256: cfc737b1eb77682b4a12839dddbb2ca3edf8e7ed2e2ca3c0944a26848ba1d201
162 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'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the document's structure suggest it's designed to trick users into navigating to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=agrahara+ran+application+form In PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fdf9c307bce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_5fa99fad057dc.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/wisatutadi/december_25_zodiac_sign_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/b_p_r_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/51230839394.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/database_system_concepts_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/s_p_ka_full_form_kya_hoga.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/cm_to_mm_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c2b943-f310-48ab-bbdd-dc17b00a463c/mha_heroes_rising_full_movie_english.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/vabuxaganiruwi.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/acrylic_plastic_pvc_sheet_perspex_cutter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf80624d27a447098d3adf/t/5fd60ba39264095525c9d918/1607863209663/71360877741.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_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 30736 bytes
SHA-256: a758f70232914c7d68edc9d54991d9e7f1ca19b052cfe57c2e3d290e916c641b
font_01_sfnt_off00014f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F72 5240 bytes
SHA-256: 8abbb063b73d1bf670c578c46d9db78ad260cdb6b06d37782f988b3899534e0a
font_02_sfnt_off00016124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16124 11164 bytes
SHA-256: 1289e6244ce50e603b83422d845022f9a0c3d439bb3a5f2d5a56cf9a44bfe2d6

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