Malicious PDF — malware analysis report

Static analysis result for SHA-256 4452e56b9838f5cf…

MALICIOUS

PDF

50.4 KB Created: 2020-10-23 10:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 145dd31f21e8c020bb9258b7ab296030 SHA-1: 077046b4639d979b2502c0999a4466160fb850a1 SHA-256: 4452e56b9838f5cf6096eb95d4c937a0c3526aa9808c573f9333ade01bc574f8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document's content and structure suggest it is part of a link farm designed to drive traffic to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=neet+botany+notes+pdf In PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/dinisepomuzejekeged.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/wiwebomavet.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ab613.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/2332101.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/figasivumo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1875ac79-7108-4220-8fed-4dc8a7ed4e78/zanezokimidizujez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62798587-8049-4f31-86cb-e2c8f1f9884f/lafuvav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1bd403-14a6-45f7-8e48-4064cbf6bc52/jilokapepimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f592ff0-c93a-4ed0-ba88-b7f4bfd1b720/pusulizori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de3fd71-0381-465b-9b09-9ff20d230e03/fantastical_2_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/wuvakikav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8748/5342/files/68033212258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0888/5414/files/experiment_8_acid_base_titrations_pre_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7238/1637/files/turn_off_google_voice_keyboard_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/40988504824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1879/2345/files/sapixonadasamase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/synthesis_and_decomposition_reactions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4768/1700/files/shinmai_maou_no_testament_departures_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bfb1ce-78d6-482a-8863-491fecf08399/pexidizitipef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074ddf40-a524-4014-8cce-ed7b139685c1/javajopidijobekesavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9c8b33-8892-4567-bc79-f2e3572208c6/veribujojujefikogom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2759217e-9242-43ab-8764-6d4ee499157d/83608212855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a481ef4a-4012-4733-9882-9859f9dfec72/10081683697.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD5 5116 bytes
SHA-256: 433ca0337916d795f379f324a4dd77a9a02ed72ac3575de823fc19dbe563ec16
font_01_sfnt_off00007d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 10168 bytes
SHA-256: 3135b67a80a58e172f6e2bb5e07256ceab87ac1cb5f9985eb54afd1bf430fd8e
font_02_sfnt_off0000a03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA03F 17496 bytes
SHA-256: 5a80a91c21e1f40066e0ae3d82703e7d6291573ee926d9437bd9b1ea9f0ef93f

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