Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6b402e6dc6290e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 11:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e83303431dd7ba0d598c42b7571e54c SHA-1: 203a67a713cd4729d3e995e67fd53f45b931cb9e SHA-256: ee6b402e6dc6290ec234b03542fa74ca17b7c0033a23aec0d199aaf5318276f1
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cateterismo cardiaco en pediatria pdf' and includes the malicious URL, suggesting a lure to a malicious site disguised as academic content. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic.

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=cateterismo+cardiaco+en+pediatria+pdf In PDF document text
    • http://files.hpvaction.org/uploads/1/3/2/6/132681294/lokedanunasigiwezesi.pdfIn PDF document text
    • http://zekadete.alphatrucksolutions.com/uploads/1/3/1/6/131606228/bc291ce.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/1/0443/3425/2188/files/56634908171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/nobasekifosujifajikaduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7831/1326/files/10_day_forecast_fresno_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/luvexego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/b._ed_date_sheet_2019_balochistan_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/4951693390.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/1/0440/7299/2918/files/carrom_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/algebra_2_practice_and_problem_solving_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/13244933689.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 1

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_off00005e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9B 5172 bytes
SHA-256: d5041cac1af4d0bf8ec36bec8b51bff712996dd9a3557623c0017d732610c665
font_01_sfnt_off0000701e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 10660 bytes
SHA-256: a0fb7283e27b177c4764c9e1aae406b2ae3985b57789b947b0a394320208999d

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