Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8ec5ab4bf442fe…

MALICIOUS

PDF

37.5 KB Created: 2020-08-18 13:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 437189f6cef33bc88397a5b679544fa0 SHA-1: 51954e08d9d6379350b8df33253ddbc9175bb719 SHA-256: fc8ec5ab4bf442fece317ecbb9c529071900a3045d348fcb78cf3b2e62a2a7fa
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, a technique often used for SEO poisoning or to obscure malicious redirects. One of these links, 'https://ttraff.cc/pify?keyword=yakuza+kiwami+2+cabaret+date+guide', is identified as a malicious redirector. The document body itself is heavily obfuscated but appears to contain the same URL, suggesting the primary purpose is to lure users to 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.cc/pify?keyword=yakuza+kiwami+2+cabaret+date+guide In PDF document text
    • http://files.rosslynpublishers.com/uploads/1/3/0/7/130776786/fibowabe.pdfIn PDF document text
    • http://files.10and10onthego.com/uploads/1/3/0/8/130814345/faxitapuxibetex.pdfIn PDF document text
    • http://files.sistahspacemidwifery.com/uploads/1/3/2/3/132303010/mozemepavuzevipibutu.pdfIn PDF document text
    • http://files.harleybrooks.com/uploads/1/3/0/7/130775331/rakuginozolu.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/1/0446/7235/2419/files/9299019842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/pseudophakic_cystoid_macular_edema_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/venukilidiwub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/bozododepananixabek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kikuzeveguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8037/files/mepoloxive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/67598846339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/amrutanubhav_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/simusamowawibuferavoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.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 4

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_off0000555b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555B 5488 bytes
SHA-256: e8c188dd57ce2300babf8bdada2a45e44af6b71f202664f953644d910376a3cc
font_01_sfnt_off0000680e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680E 9756 bytes
SHA-256: a87e8cc37b243fba6d7fbfe8d81ccafd58001579e4d8bcd3281ce6710c90ee2a

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