Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09675d6cea945ff…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 07:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cdf2909d741b82a5270423507332e67 SHA-1: 075fd66497747475bf6b1794e7ca9099e5780592 SHA-256: a09675d6cea945ff6c36cb6159cbe8017af20b2ecf0d15017e595af494a871c2
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains the text 'Ib art comparative study examples' and the URL that triggered the malicious redirector. This suggests a link farm or SEO poisoning attack, where the PDF is designed to drive traffic to malicious sites.

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.cc/pify?keyword=ib+art+comparative+study+examples In PDF document text
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.pdfIn PDF document text
    • http://files.goodatlooking.com/uploads/1/3/0/9/130969200/7445030.pdfIn PDF document text
    • http://nuvajobim.officeassetsreused.com/uploads/1/3/0/8/130814017/wadoje-xurade.pdfIn PDF document text
    • http://files.freeportautoparts.biz/uploads/1/3/1/1/131163920/sodorugazikab.pdfIn PDF document text
    • http://files.thetrophyshopplus.com/uploads/1/3/1/6/131606494/ramubijakovixekikef.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/1/0431/2956/9434/files/rurebifibolatawetefogiwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/afficheur_lcd_16x2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/avon_online_brochure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/10316303709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/mysql_workbench_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/30265002611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/36260613657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/behavioural_design_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/aashto_bridge_design_manual.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_off00005b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 5528 bytes
SHA-256: 59961db21065c2d26e9ca487e69680cd5aa16b8975e351057aea61157cf25612
font_01_sfnt_off00006e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 10640 bytes
SHA-256: a6fdcff2a4c13830cebe2c853b91ac6a73cc88809437948896f686b4cd0be2bc

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