Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bbd40e101a48e4…

MALICIOUS

PDF

51.9 KB Created: 2020-08-09 20:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d2d1f027db0351e82336cfda64dadc8 SHA-1: 43f794a3dc7d387b716b2c294c5e128199fd3ed8 SHA-256: 50bbd40e101a48e4660a12cbd34a7ec0e726487885ee502494cfc7e75aa51521
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with the primary URL pointing to a redirector service. This suggests an attempt to obscure the final malicious destination, likely a phishing or malware distribution site. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a redirector, supports this assessment.

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=fiches+auteurs+bac+fran%25C3%25A7ais+pdf In PDF document text
    • http://files.sacvalleydha.org/uploads/1/3/0/8/130874055/91f5be3d7.pdfIn PDF document text
    • http://files.enhancedrecovery.info/uploads/1/3/0/8/130814056/cc683b1.pdfIn PDF document text
    • http://files.ebenezermethodist.org/uploads/1/3/1/8/131872198/641427.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/1/0432/9819/3573/files/60141374756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/lukator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/three_waves_of_feminism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4507/7660/files/fopobalokuneza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/gipadeberebuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/goxenika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9518/5824/files/8619876532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/10282338143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/kinetika_adsorpsi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/64690971434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/digestive_system_test_ks3.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 4

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_off000086db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DB 5488 bytes
SHA-256: f7daec8ce7fa861b0799c419ff8ea1ba6dbb54f82b58ab83d65c32922207c868
font_01_sfnt_off00009931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9931 12688 bytes
SHA-256: 09dd9bb97b2c1c6487eba981fa874614d95aa151aea711e371fd92bb9704e983

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