Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c18a114b835db93…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 16:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b2b153cc353efac90cd0fef6368057b3 SHA-1: 3118fb400b61f68606bc9077d4e310a9bf422112 SHA-256: 3c18a114b835db9376dca43550130c8110d5f1c2a2151c2d98b8975b0597a0f6
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is designed to lure users to a malicious website. The document body text, while garbled, contains the target URL, reinforcing the malicious intent. The presence of numerous external PDF links, many pointing to similarly structured URLs, suggests a link farm or SEO poisoning tactic to distribute the 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.ru/pify?keyword=calendario+2020+con+settimane+pdf In PDF document text
    • http://files.olneyartscouncil.com/uploads/1/3/2/8/132815008/gujotovexowegemapu.pdfIn PDF document text
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdfIn PDF document text
    • http://files.escollins.com/uploads/1/3/0/7/130740249/nofevixadaw.pdfIn PDF document text
    • http://files.camerarepairservice.com/uploads/1/3/2/6/132682040/lafesutaronax.pdfIn PDF document text
    • http://fekosat.mlkswim.com/uploads/1/3/0/7/130775403/xebujetet.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/1/0430/3332/9817/files/28384599589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/91120778543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/89107866599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/sibubimogegoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/mcmaster_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/carrera_armamentista_guerra_fria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/74008925008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5690/6911/files/nikujavuduvuwiwemawofizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/48482030292.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_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 5480 bytes
SHA-256: 8a60ead7fa36d712fc8f3825df1091baa378936ac8ecc971e207a0b434bf5744
font_01_sfnt_off000073ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CA 10952 bytes
SHA-256: 7f9ae34985d7d5e38605495c93c68e1cc17efb36eca50fb30634df971148d1d4

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