Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adc05baf549f093…

MALICIOUS

PDF

65.0 KB Created: 2020-12-13 21:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-20
MD5: 08f251b1cf6f3433b30b278c68f83c3c SHA-1: 1fb0ee3a05c70971bcfcb5e39703607c7ded7178 SHA-256: 9adc05baf549f093d27f11ff595151cccdd93523b8e302fb199e6fc9670bebee
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to redirectors and SEO link farms designed to lure victims into downloading further malicious content. The document body text, while appearing to be academic, is likely a pretext to encourage clicks on the malicious URLs. The presence of a known malicious redirector URL and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=miles+and+huberman+analisis+data+kualitatif In PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/after_anna_todd_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f9278ef290cb.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/mujobotuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fd2d4bd7e29f.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/tigebu.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/dozawuzowapenalex.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/c_form_haryana_gov.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/29110666709.pdfIn PDF document text
    • https://berapiginufar.weebly.com/uploads/1/3/4/3/134316450/7986867.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/boost_juice_nutritional_information.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/138040.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c349.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c349.bin)
    • https://uploads.strikinglycdn.com/files/f287f997-5b4d-42be-abd1-1b906003375f/carnation_baby_formula_good_start.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 extracted file (font_00_sfnt_off0000c349.bin)

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_off0000c349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC349 5356 bytes
SHA-256: 3b4532cb652570d97cd7b84bfef1ace8bfe78ee454e59e56f1411686a17c0002
font_01_sfnt_off0000d557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD557 9880 bytes
SHA-256: 17d3224e6bf431495b690763190ba0b16382a1dfeeecb3a8aa525259c19223a4

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