Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd305ad6a1b9502…

MALICIOUS

PDF

32.7 KB Created: 2020-08-16 16:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de9d93f18b5616c59beba32a63909994 SHA-1: 34bd818711cd13f1b9ed95f498b18aff93c318c7 SHA-256: afd305ad6a1b9502ba0f56e4adc2fc7950f9b33490ac35b035781655fbc0ae78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Allan gray namibia balanced fund fact sheet' and the wkhtmltopdf application, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=allan+gray+namibia+balanced+fund+fact+sheet In PDF document text
    • http://files.vickijettterry.com/uploads/1/3/1/4/131454556/5616c5e5.pdfIn PDF document text
    • http://gibubob.nicolezeng.com/uploads/1/3/1/4/131453526/4402364.pdfIn PDF document text
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.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/1/0447/4486/7994/files/elementary_statistics_william_navidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/35061719420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/gikovojubojetefikerar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/redabiravek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/30734206025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/numeros_em_ingles_exercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/59726009201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/o_reilly_advanced_python_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/zajifugexolapeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/pathfinder_bestiary_pawns.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 8

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_off000040f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40F3 5668 bytes
SHA-256: 494a7071adc9134c0242b08f780443244a36b7eb58ff48d7f4e8884029b2f050
font_01_sfnt_off0000540e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 10028 bytes
SHA-256: 6f6b168b3535f54cfda90a11d541139a94347ea7055aa9f31ea5fda2e1b0f553

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