Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b87e42b2a31775f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 02:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a77b114c42c41d6a3e96513b742b33c8 SHA-1: 797aced43b265de99ee922a9e4e25aad93d2af2c SHA-256: 8b87e42b2a31775fdfec18b23a9bdb0645226810a117d7853fc1b7d423cc746f
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.com/pify?keyword=hybridization+of+co2+pdf. The document body is heavily obfuscated and contains many of the extracted URLs, suggesting a lure to external 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.com/pify?keyword=hybridization+of+co2+pdf In PDF document text
    • http://files.seafieldfarmva.com/uploads/1/3/0/8/130814078/38b4a5431b0.pdfIn PDF document text
    • http://files.crossharmony.com/uploads/1/3/1/4/131453648/e192330ba6d7c65.pdfIn PDF document text
    • http://files.readmoredaily.com/uploads/1/3/1/3/131397981/gujukisukobe-tegapez-nafekipozin.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/1/0432/4383/1458/files/32371568695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5065/5129/files/viputizudowate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/goldoni_la_bottega_del_caff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/wupesapizelowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7310/0184/files/sikadexewijojemefiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/40553532515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/vesatuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/raxaxiwitijadiwanad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/recursive_pascal_trianle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1459/2408/files/zazuvibafibosiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/possessive_pronouns_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/komatsu_parts_book.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 7

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_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5324 bytes
SHA-256: 60d46d7a7ebad3d037cd234fedc3a6bf083c97f51925c14fe1c5cdb653d26fc2
font_01_sfnt_off000075dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 10676 bytes
SHA-256: a9ba34f52786f7b2a3d691c71c40beae740e175076f77584e46b5199001d0444

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