Malicious PDF — malware analysis report

Static analysis result for SHA-256 992f8cd8d647bf3c…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 03:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9171c5ecd40e82cb690a7c3802e6d8cf SHA-1: d54c53432e4e870d32b02d0bddc53b6189ffb960 SHA-256: 992f8cd8d647bf3cbd048f45d3e5d0e059d9f29cd56e129aa1b65ff40c359769
194 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many links pointing to benign Shopify domains but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Systematic review handbook pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious URL is https://ttraff.com/pify?keyword=systematic+review+handbook+pdf, which likely leads to further malicious 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=systematic+review+handbook+pdf In PDF document text
    • http://wupafore.bundles4babies.org/uploads/1/3/1/3/131383657/77486.pdfIn PDF document text
    • http://files.netbenefitusa.org/uploads/1/3/1/0/131069950/6004021.pdfIn PDF document text
    • http://files.e3embedded.com/uploads/1/3/1/4/131438067/miwevagi_begufura.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/1/0428/9927/5935/files/kederudatirewefogesariz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/kesozobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0325/6737/files/acute_lymphoblastic_leukemia_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/ferusizaxexodegulabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nosisuzamozozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/pixuniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/dead_poets_society_movie_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/28792791014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/6th_grade_reading_comprehension_passages_with_multiple_choice_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/dorekolatiguxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/lijuropavimatibulo.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 1

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_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5924 bytes
SHA-256: 9fefb4f4c924150bd6e127ca2dc7da362d14f17a9de658204a76f3e47667bc09
font_01_sfnt_off00007514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 14996 bytes
SHA-256: d211bae821c762ceb26057cc94a8a56d175b8e13a78315d37448e979258e3c0b

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