Malicious PDF — malware analysis report

Static analysis result for SHA-256 1813afee372f916c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 06:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c6d11f7ab33867d12a3c1666fee62ec SHA-1: 640b3f2f4202761a064be287f9f66c1113a9acae SHA-256: 1813afee372f916cafed5b1038cf8c872a390193779927243fe199cf592940a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a URL associated with malicious redirector infrastructure, specifically disguised as a search result for "Texas dental jurisprudence exam answers". This indicates a phishing or scam attempt, likely to harvest credentials or lead users to malicious content. 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.ru/pify?keyword=texas+dental+jurisprudence+exam+answers In PDF document text
    • http://vemotu.pennlawlambda.com/uploads/1/3/2/7/132712615/dasazorena-wuvolaxoxa-zedewerore-nabem.pdfIn PDF document text
    • http://files.qarpet.shop/uploads/1/3/0/9/130969065/8566434.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/1/0428/6224/8102/files/hancom_office_netffice_24.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/biochemistry_lab_test_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/zebra_barcode_printer_gk420t.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/27191919022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/epilepsy_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9262/3016/files/15919503136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/lakimatefekifutatavurej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/diseo_de_investigacion_descriptivo_correlacional.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/fowirotezowibudoripokekus.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 2

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_off0000668c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 5404 bytes
SHA-256: e0ff2cbb819227acc4697e4c430187eaf22ca709a393f6db17a2f51fea6da570
font_01_sfnt_off000078e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 10712 bytes
SHA-256: b06cd29653441a1f384ec40035d4ceeb546f68637395191cc96fd6c7ee66d042

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