Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da98175dbeb1eca…

MALICIOUS

PDF

146.8 KB Created: 2020-10-22 20:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 781ffcf1c870895901365de0277bf21c SHA-1: 8483a42ff8e4761020554d6975d52697731fb864 SHA-256: 0da98175dbeb1eca5a14376ecd919ac6ef3c2d17ead61ec3c3ed200285cf2e4b
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://gettraff.ru/123?keyword=hypertensive+emergency+2020+pdf', is directly associated with this malicious activity. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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?keyword=hypertensive+emergency+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f874a89a8146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8826f917fab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f875adceb25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8efb4a426c7.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/botow_wovutiz_rosusudeju_sikopafebuxaze.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/7d35d.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/3649022.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/nikusuz.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/vuzufexarevima/26605854365.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/97513405289.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/31240853920.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/59080584706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebacd899-6f83-4497-84e1-51be7e51eded/16436422052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a96c489-a0a8-4bd5-9a66-d61c463ba0a6/manual_journey_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2824d67f-0a6a-4f6c-9e24-de5d0a7f280c/fitosaxupogudezumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e70319d-8074-49c1-a0a6-110f8074663a/7748244631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17755433-98fe-46d7-aefb-abfbe57cff85/nuvev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9142ef13-a024-408e-84c1-30776cbeee0b/pikemesarunojebige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f9f69a-1233-4900-850e-8935651477fd/34476201435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605c89e5-b036-4f99-aaa7-d7e822192d72/49289018924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c48507-1db8-423d-afa9-da5b3461c080/xizanefefizax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cc4a55-1da7-4e47-bcfa-53654d6dbebd/lejiwegurovinizetewakiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b615411-bc7a-4ad6-b7a9-caf8b89bb352/pegikepuverobasutuguvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533c2923-dc4b-4117-b3d9-963416220a7c/gusidizupobijejori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5a0af5-317d-45e7-bdb8-027a5c6c4440/dexojajakolofigarijeno.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_off0001f0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0FB 5308 bytes
SHA-256: 063a547ce291fdc016786b4de63c0847e60f2476bb439777dccabb5ccab921ca
font_01_sfnt_off00020303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20303 13220 bytes
SHA-256: d437057750adbd549c4a59a3dc44c3b750e5afd9a32c556b2102e5e1b2b8e1d7
font_02_sfnt_off00022e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E0E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361