Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ca086731d3a206…

MALICIOUS

PDF

34.7 KB Created: 2020-08-17 08:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfdc193ed0540911e762746ffe706919 SHA-1: 3e2fbb9af1675d220c8d671bc60c89f080d31bf0 SHA-256: e4ca086731d3a2066a890a03e8daa852d25a14410d6d0aeff4e679fb7b6ed2df
194 Risk Score

Malware Insights

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

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=ill+guided+synonym'. This suggests the document is designed to lead users to malicious sites, likely for phishing or to download further malware. The presence of numerous external PDF links also indicates a link farm or SEO manipulation tactic to obscure the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=ill+guided+synonym In PDF document text
    • http://tolikuba.nomomani.com/uploads/1/3/2/6/132682883/9a1eb91938d.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/1/0438/8497/0139/files/degebagoxinadomix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/50891927641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/94646786452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/character_animation_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/nhl_hockey_score_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/negative_prefixes_to_form_antonyms_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/76043135573.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 1

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_off00004bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD7 4880 bytes
SHA-256: 337227796b940f43cf08d79d01f8a89eebd64d2adc4156efd0d7dd0814b70c24
font_01_sfnt_off00005c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C64 10128 bytes
SHA-256: 0ea5729a5189ced5bee0430f8ca7471e1559db8e75cb31d57a023aca4be3250a

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