Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec08902a06576f2…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 08:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 840f56e59a7dac6be03dedcf8a968ee9 SHA-1: 5a61481db09dbb6268496f23f5b52350bb3fe065 SHA-256: 0ec08902a06576f20fe8b6911541c395771c37e1cdc138e8012cc6f03be46dce
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains the same malicious URL, suggesting an attempt to disguise its true purpose as a lure for free educational materials. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=calculus%20limits%20worksheets%20free In PDF document text
    • http://files.treasurlybydima.com/uploads/1/3/1/4/131411199/buroni.pdfIn PDF document text
    • http://files.kingdom-mindedmoms.com/uploads/1/3/0/7/130739697/vititopiviwokuje.pdfIn PDF document text
    • http://files.signorimanisalonandspa.com/uploads/1/3/1/3/131398323/tifazupamit.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/1/0439/3477/7499/files/ratogozenujopefeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/hidradenitis_suppurativa_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/yamaha_rx_v373_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8799/3763/files/change_scroll_direction_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1210/6912/files/various_definitions_of_curriculum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/tojulatozubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/computer_basics_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/xiwasovuvin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/los_de_abajo_mariano_azuela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8824/6936/files/1705899066.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 5

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_off00006912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5180 bytes
SHA-256: 4cf3ec3920578d84fd02a24557f1ce1ed0f8284bd98bdad89a40f21e04c364fe
font_01_sfnt_off00007a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 10120 bytes
SHA-256: ceffd657457613ce496e279a7e344e63ac8668c005b5be7a6398d8d19c4598c0

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