Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf8718fea209dab…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 18:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b61da7c74b54f43697db562c8c6eede9 SHA-1: 06a35745e3901e5125f11f7a0d0703e54f71be80 SHA-256: 8cf8718fea209dabc4ad8d1dbd586281be2f2ad9f7b8f19751db572ca8dbeee6
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. It also contains a large number of embedded links, forming a link farm, with the primary redirector pointing to 'https://ttraff.ru/pify?keyword=adkar+assabah+maktouba+pdf'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

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=adkar+assabah+maktouba+pdf In PDF document text
    • http://files.hlbentley.co.uk/uploads/1/3/1/6/131637043/gimixafubo.pdfIn PDF document text
    • http://files.thedreamteammortgage.com/uploads/1/3/1/1/131163867/ginezuvefare.pdfIn PDF document text
    • http://files.almamusicstudio.com/uploads/1/3/1/6/131606965/167e80ebbf.pdfIn PDF document text
    • http://nizilab.familymatterseducation.com/uploads/1/3/1/4/131453284/8ae35888.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/1/0433/0287/9387/files/27598947120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/foxobovudasegajew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/35742144883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/pokemon_solar_light_and_lunar_dark_passwords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/sujimipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/kobodipuxudobaliwuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/mejobezadoxar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/39757691152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/john_deere_snowmobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/tikewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/86770052238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/bootstrap_login_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5792 5444 bytes
SHA-256: 30d53c8fda667812fede34a3f31af2b9b552a9358b9627ee67420723a0f76d9e
font_01_sfnt_off000069e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 9220 bytes
SHA-256: 261daa9459ba828fe4fe9a18752376f5ed62970c6fbfa683b036fe48b876219a
font_02_sfnt_off000089b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 16940 bytes
SHA-256: 60a5c01294947b861a9c4bc460e8796d0d006c969b866edec81cea26efee6595