Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad899303abaa0b6b…

MALICIOUS

PDF

52.7 KB Created: 2020-08-10 05:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d072f4add35b9e607384a447502a2e5a SHA-1: 3915af557aa8effe8c416318090a36e76142565b SHA-256: ad899303abaa0b6b5a86d96f3cb07d6214deb14173ef1966fcf8369d88611dcf
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as legitimate resources, but they redirect to a malicious URL. The document body and embedded links suggest a phishing attempt, likely using a lure related to 'isometric hamstring exercises pdf' to entice users. The primary malicious indicator is the redirector URL, which is part of a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.ru/pify?keyword=isometric+hamstring+exercises+pdf In PDF document text
    • http://files.backpackphotos.com/uploads/1/3/2/6/132695343/0856d.pdfIn PDF document text
    • http://files.theyogaschoolny.com/uploads/1/3/0/7/130775942/668541.pdfIn PDF document text
    • http://files.megwestphotography.com/uploads/1/3/2/8/132814096/rasaleg_zapilidubufix.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://cdn.shopify.com/s/files/1/0428/3164/2780/files/renatafuxuregitebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/zolewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/rabivawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/gotavuwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/centrifugation_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/rajijazezodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/59063099255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/10205681562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/34077624964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/recetas_vegetarianas_para_bajar_de_peso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/lifigukuxajuwapup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/analise_morfologica_em.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BF 5328 bytes
SHA-256: a290d407957b60bf24574c8dddb342546b89e455e90e27da09f918122542424a
font_01_sfnt_off000096b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B7 9712 bytes
SHA-256: aa2e17e48044ac891ff55007b2e5e6beb767140b4aee6e11f66b981d19821d39
font_02_sfnt_off0000b7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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