Malicious PDF — malware analysis report

Static analysis result for SHA-256 386b68bfde89daf9…

MALICIOUS

PDF

67.1 KB Created: 2020-12-22 15:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4cd3a23f11ba69140fd20961ae9d453 SHA-1: 5de7589ad18c61c822ade9e48d17f0c1cdba459e SHA-256: 386b68bfde89daf9db6d821378d1671d37baadcd0f8ae090e017dff061af9d69
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 'ggtraff.ru'. This URL is likely used to lead the user to a phishing page or to download a secondary payload. 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://ggtraff.ru/strik?utm_term=arterial+hypertension+definition+biology In PDF document text
    • https://static.s123-cdn-static.com/uploads/4458837/normal_5fdf0e47e2134.pdfIn PDF document text
    • https://koropiliful.weebly.com/uploads/1/3/0/7/130740252/fba09d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_5faff4256b5ba.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/zamuriza/zepiwefamur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa2e9e9-ad4f-49d0-b982-f8b385568a24/86013246413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a2d7ee-09dd-490b-bb7b-cbd7e88bbab3/pubg_lite_indir_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ffc038-aae6-4b6d-b82a-a507f03ee35f/mezuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad5595ec-3f37-4ed5-bd18-1251ac401db7/duzilogono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9673887a-084d-4c90-b50c-2aba7eab15df/ferowaruluwujutajafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e678059-a7f2-4ae4-a410-2e9a81df2d70/table_theme_ideas_for_trivia_night.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/anarchy_reigns_trophy_guide.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_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 5532 bytes
SHA-256: 32a506893e2a7362e8ce9d8a5e74eff6a3df081a2131c0f52d0df75713c77a78
font_01_sfnt_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 9656 bytes
SHA-256: c65516efea47b507fb9a81db85214a2b24b035aa2d7c47d63efec285b12ab8f7