Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a1227d7dea7953…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 21:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdbf242876af84471bc573179687275a SHA-1: ff178fe8c4d3d7ed2ff72d2effca9705d4a938b8 SHA-256: 19a1227d7dea795392f8e3a95566cc5cf4a7174b49ee31951a47d2cdd38f5973
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector URL associated with malicious activity. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic and potentially distribute malware or phish for credentials.

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=ammonia+in+drinking+water+pdf In PDF document text
    • http://files.normanmuseum.org/uploads/1/3/1/4/131482919/tiketedujomoganosuz.pdfIn PDF document text
    • http://files.emmagardner.com/uploads/1/3/1/0/131069812/muwomenidodobov_gamasosepovowu_tufozaxigip_vujufimiwozi.pdfIn PDF document text
    • http://files.matthewjacksonart.com/uploads/1/3/1/8/131857717/kojaro.pdfIn PDF document text
    • http://files.mx.youngstaekwondo.net/uploads/1/3/0/7/130739387/7151198.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/1/0429/4639/6326/files/sonov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/64455223541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/sijago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/5792588156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/11789124362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/rovof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/64064591386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/poulan_chainsaw_fuel_line_routing_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6626/7550/files/ets_toefl_ibt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/40679588216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7066/6390/files/berigofagim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/35928828167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/molebudoninunene.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 5296 bytes
SHA-256: e4fcc730c5be94fd011ee8510c6d86d63d1ac00cc7e7187e8667cb171d1cd832
font_01_sfnt_off00008426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8426 10020 bytes
SHA-256: 3cd167d6ead35eef262f2320dcb1c1e0de26eb0d3949a9540d9a41e457b94306

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