Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c86a2d5690234d1…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 11:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9896b0c43444aa12e892cff2bed57d6e SHA-1: 83ccf5a4ff61f7ca47794e0dba704ae4002dea90 SHA-256: 0c86a2d5690234d13c9e86c624f849e1629027af10398c74388ea3f92ae7f510
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, which in turn leads to a large collection of other PDF links. This behavior is indicative of a link farm or phishing campaign designed to drive traffic to potentially 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=statutory+auditor+appointment+letter+format+in+word In PDF document text
    • http://files.mindregard.com/uploads/1/3/1/8/131856232/lebazijika.pdfIn PDF document text
    • http://xuxuxo.chicagoconsulateofsweden.org/uploads/1/3/1/1/131163658/vugavosog_nawuwaxe.pdfIn PDF document text
    • http://files.walkandcycleherefordshire.com/uploads/1/3/1/3/131380354/jamotifut.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/1/0435/4647/6708/files/ez_go_txt_service_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/ximeloletosaxobafolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/12480338740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/binomial_coefficient_properties.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/synthesize_information_from_relevant_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/vcloud_director_9._5._0._3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/abraham_abulafia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/fijebuge.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_off00005b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 5304 bytes
SHA-256: a726b24cb19873f9a7ce6ff02450be0de38d31d5fad5cae6e650bbbce603a67e
font_01_sfnt_off00006d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D85 10664 bytes
SHA-256: f331582ef8874b06feb5dc2a889a6efa26d535b7584ee65a1e36c35ed399134b

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