Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8985b8ce3a681c…

MALICIOUS

PDF

51.0 KB Created: 2020-08-07 03:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02c50281b6bf9b05fda8dcc6e3acd01b SHA-1: 7d7de1eaf5ffbc1d5f8c40815d27b9c940b934d3 SHA-256: 6d8985b8ce3a681c3a0b5fa5939857bbbf9eaa9509333df4889edd3bcbad5d8f
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as legitimate book downloads, but they ultimately redirect to a malicious SEO link farm. The primary redirector URL is https://ttraff.ru/wb?keyword=pediatric%20nursing%20book%20parul%20datta%20pdf, which is flagged as malicious. The ML classifier strongly indicates maliciousness, and the presence of multiple PDF links points to a link-farming tactic.

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/wb?keyword=pediatric%20nursing%20book%20parul%20datta%20pdf In PDF document text
    • http://files.orfeonportuense.com/uploads/1/3/1/3/131379296/zabegakoguxivobal.pdfIn PDF document text
    • http://files.elizabethbaumanart.com/uploads/1/3/0/8/130813357/vigakikugi.pdfIn PDF document text
    • http://files.catnip4cats.com/uploads/1/3/1/3/131380058/xominodefixedajo.pdfIn PDF document text
    • http://files.edgertoncentermakerspace.com/uploads/1/3/1/3/131380723/worigibutasivid.pdfIn PDF document text
    • http://nogasamo.lickandapromisekennel.com/uploads/1/3/2/7/132740405/1fc1689f.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/1/0437/6012/4065/files/adsorption_et_absorption.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/90133968832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/ccna_routing_and_switching_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/mujafawajokofanebenujijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4496/9365/files/black_hawk_down_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/astm_a240_304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/probability_rules_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/vetozetupulawegipikof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/kusepavixuxuguseda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6116/3670/files/equations_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/24783490475.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_off00007646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7646 5528 bytes
SHA-256: 97da57b783e664e387f317339529f86127039d0d98816e348ebb3fa66ab55f16
font_01_sfnt_off00008921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 17312 bytes
SHA-256: 579dc6984254574d34adc5833501e891f57d2c12782419eb14203b94651aff1c

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