Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c74ec412776ed7…

MALICIOUS

PDF

43.2 KB Created: 2020-08-05 14:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e4aed41e1ca82fd5bc8a4359b052f47 SHA-1: e6f04b59f8501ea80582530f36c7b88630a572c9 SHA-256: 72c74ec412776ed79814f05f1c4948c7b15a322ca03dae3e55e1267bb166803d
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, also contains a large number of URLs, suggesting a link farm or SEO poisoning tactic. The primary purpose appears to be redirecting users to external, potentially malicious, resources.

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=auditor%25C3%25ADa+de+tecnolog%25C3%25ADas+y+sistemas+de+informaci%25C3%25B3n+piattini+pdf In PDF document text
    • http://files.theroyalpriesthoodblog.com/uploads/1/3/0/9/130969896/e009976.pdfIn PDF document text
    • http://files.hampshiresurreyblinds.co.uk/uploads/1/3/2/6/132681928/zerakas-wanazajaw.pdfIn PDF document text
    • http://files.stevehowell.net/uploads/1/3/0/7/130775308/246924.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/1/0431/6980/8550/files/zoranawevovupabesugik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/sijixogop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/31390795145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/46114709243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tedix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/65362574013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/wugejijixabavoxobak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/vifuwepaxanenasixopibita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/liruganufezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/tuzor.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_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 5756 bytes
SHA-256: 379b695e66e5518965b98310b3dce6d18a62e2785bb6c540454795b880cd9831
font_01_sfnt_off000076f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F1 11868 bytes
SHA-256: 7c910ee3a2bcd62588a26df2dfc3a1cb3157526d7e403eedf7ec05c030ff95e1

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