Malicious PDF — malware analysis report

Static analysis result for SHA-256 281035857ba2636b…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 13:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3d4682da0258444c60f60139212295bf SHA-1: f2e6fa2e428a9b1544ba577fe01428ea5c220bb9 SHA-256: 281035857ba2636b520e2327b2366120d5b8938d37e34d5483ae864da11ef264
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content related to professional certifications, but it redirects to a known malicious domain. The primary malicious URL is https://ttraff.ru/pify?keyword=formation+auditeur+interne+iso+9001+afnor, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains this URL and other embedded links.

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=formation+auditeur+interne+iso+9001+afnor In PDF document text
    • http://files.olivetcongregational.org/uploads/1/3/1/0/131070820/8859373.pdfIn PDF document text
    • http://nusaxip.heartofcoloradofiberartsguild.org/uploads/1/3/1/4/131437914/2873680a.pdfIn PDF document text
    • http://files.wow.yez.dk/uploads/1/3/0/9/130969300/950705.pdfIn PDF document text
    • http://xoziwel.theabsolutemotivation.com/uploads/1/3/1/3/131398140/4966264.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/1/0437/6153/3082/files/33795445314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4367/6582/files/18511986644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/kaxugavegel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/13269874737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/mirorol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/13581077985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/gta_online_best_apartment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/89464412839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/24006867234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.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 8

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_off00005bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBA 5324 bytes
SHA-256: cc70810be539b90285a50306edd4562505d3a0692da81d235fca106f778166fb
font_01_sfnt_off00006db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB7 10100 bytes
SHA-256: 719b9ce0834d339b2c5a08c657a443ddbd9b7e668ef2a7fe65d0ab9e30e329c1

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