Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4cf2729302456fe…

MALICIOUS

PDF

71.4 KB Created: 2020-08-09 11:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dffa9bdbfa1fb60e9408a500eb2050c7 SHA-1: 9c614ac3c9da8f9ef2f7212b2a36e4c8c1ce9541 SHA-256: a4cf2729302456fe7c3d62457f6ec8966bc14f45fd8287b21d21c557746fea6f
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that is also flagged by the heuristics.

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.com/pify?keyword=brand+awareness+meaning+pdf In PDF document text
    • http://farilikim.katetobin.com/uploads/1/3/1/0/131071164/8867709.pdfIn PDF document text
    • http://files.landscapegardenersegham.co.uk/uploads/1/3/1/8/131856330/9218152.pdfIn PDF document text
    • http://files.mcmillinautomation.com/uploads/1/3/1/3/131380288/179311dd111eb9e.pdfIn PDF document text
    • http://files.oipelmiracorning.com/uploads/1/3/0/8/130814245/lufobuni-migademigij.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/1/0434/7976/1061/files/457162215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/toxiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/27965149396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/40657063839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/77325797941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/750041984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/dapitefexowewomonika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/84601275710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/sintomas_de_angina_inestable.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 7

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_off0000d161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD161 5468 bytes
SHA-256: 3b9c7cdf75e1a44dab553f203e867133bbccab5c45fa27be7d98e050cb762ec3
font_01_sfnt_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 13976 bytes
SHA-256: 7795cf4db1f2be7d54a51d889eed9eb78e4d418d4b8b05a707d6094212ab2b4c

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