Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d95090eaa1c587…

MALICIOUS

PDF

50.6 KB Created: 2020-11-03 02:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3a716db9d7eba35797a4e07ff16c440c SHA-1: a679fadc81e143b17bcd5ceaa92aa942043b310b SHA-256: 85d95090eaa1c587072f2312a27614a9d6ff9653f634c4dc195e1c70edc2baca
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary link, 'https://ttraff.ru/123?keyword=personal+vision+statement+format', is identified as a malicious redirector and part of an SEO link farm. The document body, though heavily obfuscated, contains references to this URL, suggesting an attempt to trick users into downloading further 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.ru/123?keyword=personal+vision+statement+format In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8f8aea5291f.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/1/0506/0565/4204/files/flood_mitigation_strategies_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/77362022160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5031/1076/files/the_joker_free_online_123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/dawefukovilakakuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3408/8886/files/59514926097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1779/6247/files/98163690995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/path_of_building_install_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1715/6767/files/best_tt_ammo_tarkov.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/4013528412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3630/1219/files/assitir_tv_online_apk_2020.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000885e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 4972 bytes
SHA-256: 4f545bebf2f12ec130c64f216c731521c9752866f72295eb9a4b0cd29b553b04
font_01_sfnt_off00009935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 10928 bytes
SHA-256: 6989afd5a10ac0b81580574774a8de2fe8c50dda768b852525a5e286a4cb27fa

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