Malicious PDF — malware analysis report

Static analysis result for SHA-256 433d92b191e866eb…

MALICIOUS

PDF

50.9 KB Created: 2020-08-06 13:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2194534485cce74b7d447a5ba7f3c7bf SHA-1: 28f6803a5f2e7e9876af5a9c90195eba30362855 SHA-256: 433d92b191e866eb03f62d96b94258d41fd6f832460b83e34fe14a7c49c6abec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a resource for 'Arduino projects with code and circuit diagram pdf'. This link leads to a known malicious domain, ttraff.ru, which is likely part of a link farm designed to distribute malware or phish for credentials. The document body itself is heavily obfuscated but contains the same lure text and URLs. The ML classifier 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.
  • 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=arduino+projects+with+code+and+circuit+diagram+pdf In PDF document text
    • http://motazaj.kevinmbakker.com/uploads/1/3/0/8/130874431/zunimupubekepe.pdfIn PDF document text
    • http://files.genefambrough.com/uploads/1/3/0/7/130775280/mezubok.pdfIn PDF document text
    • http://files.beachtownrattan.com/uploads/1/3/0/7/130775676/fizen.pdfIn PDF document text
    • http://files.wallartandpresents.co.uk/uploads/1/3/1/8/131857626/tegusibelesi.pdfIn PDF document text
    • http://files.riversidehomemade.com/uploads/1/3/0/7/130775953/sobajup_xanapoxi_fulalep_vezopazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7909/0854/files/83501068825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/lowivuvanigokifipoguli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5428/4450/files/73752226844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/buvomewufizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/hide_the_pain_harold_thumbs_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/puwafovifajinenupojarid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5845/2897/files/rails_scaffold_controller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/40747020406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4316/6107/files/zewifaluxakavexawigavone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/xegasawuruxumetizirolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/kenmore_air_conditioner_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/moxuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/24356095971.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_off0000870f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870F 5696 bytes
SHA-256: 2047de6f9e74b4065e4a109c56e9c1601478c91ec187837b52c2209e3043bf1d
font_01_sfnt_off00009a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 10316 bytes
SHA-256: d00fe8d0cafe40100afd8b502d82b6a6ad950ff48143ef01fb8567eecf63bdc7