Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa88d90857769676…

MALICIOUS

PDF

40.8 KB Created: 2020-10-25 23:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 28b90880a2568948a712eb7927af3b16 SHA-1: 25005290af540f1ea524388637b0380a2ee90c13 SHA-256: aa88d90857769676e4da1c6e58f663837835b551381a349ad6da097f63ff5350
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/123?keyword=tv+guide+australia+ninja+warrior In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f8c8927e0351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f9237a0c7b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8be32f9329c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_5f94131a4a322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tratamiento_para_acidosis_respiratoria.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/algorithme_gntique_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/57176052578.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/carotida_interna_ramas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee55a6a-07d5-4d0b-9375-c40cfd428be1/xifume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd29425-2d49-4913-8603-8500aea6974b/jekonexakananuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4610137-4156-47f8-b623-056f47ee0889/49110347597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173ac7e7-54aa-425a-9738-bfb6fcd103b6/56793424030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e8f05-2f0c-4e24-802a-5b2f9625f3fc/63063057628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14c76e9-a775-45c2-bc63-c2afbf1644e4/partes_el_juicio_de_amparo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5100a0d2-bf42-49b6-b063-b6c410b78b4b/kaspersky_reset_trial_club_3.1.0.29.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96067cc9-0316-49a1-a28e-201862c9f7e7/46317544526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90409cf0-2bac-44f8-a902-65b5eaca6f54/xulimonadurorejuboso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bc9792-b1da-4d80-b1c4-21f93c18fa3d/30440730030.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5469 5168 bytes
SHA-256: 5162a71328b83d2d1fb77f930550bab96d7fa4ae17136a6c9689ddb241f20a35
font_01_sfnt_off0000661d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_02_sfnt_off000075fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FC 9752 bytes
SHA-256: 55895fd712061ac8d63962d646b0934d90fe5b1c2feb6665b884bbcd8feb234b

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