Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ffa39a9a900a6b…

MALICIOUS

PDF

54.9 KB Created: 2020-08-11 20:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71863ff6cc66770a377c3d7fcd881ec6 SHA-1: 4ca8906512bbee8e79f671648436729c9a86f227 SHA-256: 76ffa39a9a900a6b840e2cc68c170a0dabe441766bbc822aa4131a4dca5f8e41
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or to phish users by directing them to malicious sites.

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=karel+%25C4%258Dapek+r.+u.+r+pdf In PDF document text
    • http://murudusez.derhuei.com.tw/uploads/1/3/0/7/130776208/pudidibipik.pdfIn PDF document text
    • http://files.nutritionworksri.com/uploads/1/3/1/1/131163872/8251320.pdfIn PDF document text
    • http://files.travelswithatoddler.com/uploads/1/3/1/0/131070124/domaloduvodojog.pdfIn PDF document text
    • http://files.serenitybirth.com/uploads/1/3/1/1/131163959/kuvewolokik.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/1/0434/5259/6374/files/kilobyte_to_megabyte_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/29436936057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8469/1094/files/80613544199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/35090422285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/86564179598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99640144283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/25162686268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/3750686780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/lifolusireborigepezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3794/8061/files/casio_cash_register_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/1937207107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/gojikojegorugozise.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 6

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_off000097c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C9 5064 bytes
SHA-256: 4ec7a381649deaa28ce168062277dd5ad213dbfcbf213f8fa58d9ce57b68e962
font_01_sfnt_off0000a917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA917 10412 bytes
SHA-256: f1b0635580033b93240527698cf649579fd90f334a566f0bb3a1430c74d6442d

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