Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c5feabf2503fab…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 00:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca4e7426d3f4baf45844c85e7d7f01fd SHA-1: f7b99ef7cdc5deeb770aaccaf4915ebd6ce5af51 SHA-256: b0c5feabf2503fab91673a2f9fc8aeae52e581efb8c1730cbcbea8f96d78e5ed
194 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This redirector likely leads to a malicious site or download. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to distribute content or traffic. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=libro+canales+de+distribucion+y+logistica+pdf In PDF document text
    • http://files.therapeuticjusticefoundation.org/uploads/1/3/1/4/131406817/lukutimalogeg.pdfIn PDF document text
    • http://suwula.christistewart.com/uploads/1/3/1/6/131606289/givara.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/1/0429/3384/6183/files/bupoxutasitipatapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/9850131616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/30590751045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2229/9815/files/anamnese_psicologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6845/1992/files/curso_de_ingles_basico_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/analytical_writing_assessment_gmat_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/wuvufefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/sabudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/50588272463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/wutipew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/58889918103.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_off00005bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 5504 bytes
SHA-256: aa396e8724f895071229e964e847b33edda18f44b4ffb0bef05e3301fcc827db
font_01_sfnt_off00006ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA2 11124 bytes
SHA-256: 0ae13b838c731d1fd23ee823b40434c614702058db6678ac93b3b1806dc8254e

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