Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19668e3f59b3804…

MALICIOUS

PDF

58.5 KB Created: 2020-08-03 14:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18f5288cb76f1abd94707728f4e94ac4 SHA-1: 86a405720771fa82cc5cfb8575be53b0ebbedcdf SHA-256: a19668e3f59b380497a4a61ca5c29fc701394675bcb71206b1215ecf66b58d00
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'cultivation of cocoyam pdf' and the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content.

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=cultivation+of+cocoyam+pdf In PDF document text
    • http://files.tatyanabyreferral.com/uploads/1/3/1/3/131380337/kilazumosufoxij.pdfIn PDF document text
    • http://files.synchronicity-investor.com/uploads/1/3/1/3/131398095/6077022.pdfIn PDF document text
    • http://files.kasubaworks.com/uploads/1/3/1/4/131483445/mewudenizuguref.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/1/0437/6500/6494/files/21198022264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/12309591645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/xituzumineniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8042/files/niturulisorararoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3945/6423/files/jolifuzegigonoxosupubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/nibuwadopajuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/nixotopedilirivukudul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/tadevaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/54091435799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1578/2045/files/jatinemupepijitevixedojer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8345/4871/files/31837639952.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 6

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_off0000a6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E3 5096 bytes
SHA-256: a92d0e8e60b77bd9e842938036d9ca50d28799e6b407b2d1c9d12c49fb7439bf
font_01_sfnt_off0000b83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB83C 10736 bytes
SHA-256: f960cd4f871921bff82a8b52fd70fba6fc0f1a07e8b207860d40ef3d59a33865

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