Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963b827e39ec4ea…

MALICIOUS

PDF

44.6 KB Created: 2020-08-05 23:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30d142c12250d5555f46d66a42269b48 SHA-1: 8bf71d3e2ced52da77b3b93003cb983efc4e42af SHA-256: 8963b827e39ec4eaecf660fd8a8a9f33ef33ce6d36f8f3975f83cd8bad8d93b6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for medical treatment information, which is then redirected via the malicious URL. The presence of numerous PDF links, many pointing to Shopify domains, suggests a link farm used to obscure the malicious redirector.

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=tratamento+cirrose+hepatica+pdf In PDF document text
    • http://files.linlinkyawhtet.com/uploads/1/3/0/7/130776489/7908300.pdfIn PDF document text
    • http://pesuzu.burtonsmaplewoodfarm.com/uploads/1/3/1/1/131164239/2461496.pdfIn PDF document text
    • http://files.healthymamahappymama.com/uploads/1/3/1/4/131454151/3e94d773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/49873505484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/importance_of_behavioural_objectives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/96918671375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/13029309330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/naive_bayesian_classifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/vuvovuvub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2735/8115/files/82268879405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/85115484718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/juriwopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kabevoketivikilumikak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/ragowazuzerupir.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 5100 bytes
SHA-256: 299824e709bf35391e2b32cbbcc89e7bd2db6048068eb4acc66aea36631a75f6
font_01_sfnt_off00007435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10320 bytes
SHA-256: 923e2f3fc05c078a45abc34d33f87de16e34b19e98be05ba6f00be64528d261e
font_02_sfnt_off00009788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9788 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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