Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b59a819f18c08c6…

MALICIOUS

PDF

45.7 KB Created: 2020-08-08 01:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 550ea5c94e6c1bb2667d57caab693169 SHA-1: 2752ffeac6a0f60d562e6ff5adfa37fb11e734bc SHA-256: 5b59a819f18c08c63d518b9906c32afa63fb07fa13e93c56148a72c7e0997127
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body and embedded link structures suggest an attempt to create a link farm for SEO purposes, likely to phish for user engagement or direct traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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=advantages+and+disadvantages+of+reading+aloud+pdf In PDF document text
    • http://files.appraisalprogroup.com/uploads/1/3/0/8/130813079/piwovonu.pdfIn PDF document text
    • http://files.hconceptshop.com/uploads/1/3/0/7/130775744/lujikuliko-towajokuwi-zulina-pigenelebojimo.pdfIn PDF document text
    • http://files.creativelybeautify.com/uploads/1/3/1/4/131408169/pelijegokev.pdfIn PDF document text
    • http://files.aidfirst.org/uploads/1/3/1/1/131164569/lasarusuludutipoluzi.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/1/0431/2537/5125/files/7136075009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/budismo_zen_y_psicoanalisis_erich_fromm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/zekujizosugonili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/soxukenijimopaxiviwizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/airliner_world_november_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4500/8039/files/calisthenics_workout_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/werinemesexaxunizizakazas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/mongodb_shell_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/zipupedevalilibejukaxesod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/harvest_maid_dehydrators.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/dulezogozavadudaxi.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 3

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_off0000742b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742B 5256 bytes
SHA-256: 6fb8a9f16961e02921d5f044af5213d743c1b99ab3232f2faa1ebb9855673e44
font_01_sfnt_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 10372 bytes
SHA-256: ec3109768cff845d7bd0d75f4126b2fd8f2bfb5e537837217e852e8db5b7d6c3

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