Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20a587510ef0b3a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-09 15:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05df2edcaf06f56bdc42066aa294db6d SHA-1: 4244da4159347c948d23c52c1932478b2a00dffc SHA-256: d20a587510ef0b3aeffd23c41a6190caf545f012468a2e2c8497fa70268c3ebe
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes the text 'Dieta para hernia de hiato pdf' and the malicious URL, suggesting a lure to a site offering information on this topic. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, resources.

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=dieta+para+hernia+de+hiato+pdf In PDF document text
    • http://gufozas.natpaton.com/uploads/1/3/1/4/131437987/zutorawus_tonekulemoxaje_debifiwipokef_zavexulas.pdfIn PDF document text
    • http://files.longfordhospicehomecare.com/uploads/1/3/2/6/132681891/nefujezeferesijaj.pdfIn PDF document text
    • http://files.paragonmedia.tv/uploads/1/3/0/9/130969652/sakixatopus.pdfIn PDF document text
    • http://suwakavo.ourcollaborativeteam.com/uploads/1/3/0/8/130874493/c9aadd8.pdfIn PDF document text
    • http://files.ayres3d.com/uploads/1/3/0/8/130874671/31e15.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/1/0433/0687/7080/files/8402105605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/assignment_problem_solved_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/reflection_and_refraction_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pobilimej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/pobodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/nekajufezolak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/53055066319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3587/5745/files/15171675569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/exercice_sur_les_animaux_en_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/senudulorigefizoruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/98118049290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4764/9429/files/guvuzix.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 4

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_off000073d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D5 4920 bytes
SHA-256: 4a5e2c2fbde5c29ea6fac61437dc7b9c908a0ca7702f3d4059a94b2b39418eea
font_01_sfnt_off00008496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 11328 bytes
SHA-256: bd54fa5b1d7008b42ef582f43e35efc533bbf15e87c37eff88d1c791c4b18eda

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