Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9dd0fb7a3b8eae…

MALICIOUS

PDF

61.1 KB Created: 2020-08-06 01:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1eca7d91effbf50583c27b2271ede880 SHA-1: da6dd43f23f4bbd6939dafbb343fab98adb45304 SHA-256: 2f9dd0fb7a3b8eae1b1ccfb3f579d41c39b77e171a74e2d71985815cdcd33329
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a known malicious redirector, and the document body, though heavily obfuscated, contains this URL. The primary attack pattern appears to be SEO manipulation or redirection to 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.ru/pify?keyword=essentials+of+neuropsychiatry+and+behavioral+neurosciences+pdf In PDF document text
    • http://files.phil-amsocietycolorado.org/uploads/1/3/1/1/131164358/f5634dd0afd.pdfIn PDF document text
    • http://files.hallsoflondon.com/uploads/1/3/0/7/130738755/1485280.pdfIn PDF document text
    • http://files.drewbcarr.com/uploads/1/3/1/1/131164236/3040481.pdfIn PDF document text
    • http://files.elishiareynolds.com/uploads/1/3/1/4/131407823/4659880.pdfIn PDF document text
    • http://files.mysugarspun.com/uploads/1/3/1/8/131872032/rowures.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/1/0435/6525/2771/files/1-_99_thieving_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/7220629352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/zovazimopuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/lizaburubilefojabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/balozolusijaxuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/60502206681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/32760647642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/zomuzuxadurom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/43494096492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/mavafegevikezetipukeg.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
🗂 Part of campaign: elishiareynolds.com 3 samples

Related samples 5

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_off0000b157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB157 5504 bytes
SHA-256: a3efa29f9570670cd9f07d2bc7695353ecfc2305145cadec2132227d56c507b1
font_01_sfnt_off0000c410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC410 10156 bytes
SHA-256: 40ae74ef5c9e676f9dd97deb2fb84617a028bfb819d565d210624e47fa62f9d1

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