Malicious PDF — malware analysis report

Static analysis result for SHA-256 def1b27214aac06d…

MALICIOUS

PDF

59.8 KB Created: 2020-08-10 09:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 028c17486ed61564d78ed68676d4b0c2 SHA-1: ca2f1fae1f9536429aa25be05bd4542e0bb9c81c SHA-256: def1b27214aac06dbfd072fba63d1c0386ed3948779aecb240f799f78952cf8f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as information about lung cancer prevention. The ML classifier strongly indicates maliciousness. The primary IOC is the redirector URL, which is designed to lead users 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.cc/pify?keyword=preven%25C3%25A7%25C3%25A3o+cancer+de+pulm%25C3%25A3o+pdf In PDF document text
    • http://files.nokilladvocacycenter.org/uploads/1/3/1/3/131379321/fodotivojinel.pdfIn PDF document text
    • http://files.revmelodyann.com/uploads/1/3/1/6/131606186/748c6ac.pdfIn PDF document text
    • http://files.kingschapelashford.com/uploads/1/3/0/9/130969386/xabikuwofabesu.pdfIn PDF document text
    • http://files.thegrovecg.com/uploads/1/3/0/9/130968960/24c28b2e.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/1/0433/7437/9164/files/ahimsa_azaleav_ephemera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/pexaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/86518480099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/83095974355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/jodufigewuxulevag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/free_malwarebytes_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/lonugiwefefapus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/fodovemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/19952333266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1687/9271/files/beyond_diet_program_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/dip_pen_calligraphy_practice_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.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_off0000a686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA686 5684 bytes
SHA-256: be4935ff98a8eda30272980b6fea09dee27c3e4571ca6d5a832d446e1b09a7d5
font_01_sfnt_off0000b8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FD 12992 bytes
SHA-256: fca3c7b2a565899877f1094d7e542c65d462de5170f81d85fba9065570ce3dff

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