Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99b85c34ef61054…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 17:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd3cbb4c00f0969e7dccf54ac7107c06 SHA-1: ed88edf4b3ccb68e6b29ce7e447f4aba77634f1c SHA-256: a99b85c34ef610547ab412254a45ba08c69c45cbd2867c065928b2caebb92ce3
202 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=clinical+examination+nicholas+j+talley+pdf+download`, which is designed to lure users into downloading further malicious content. The document body and heuristics indicate a deceptive SEO-based download lure, likely intended for phishing or malware distribution. No scripts were extracted, but the presence of redirector links and the ML classifier's high confidence suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=clinical+examination+nicholas+j+talley+pdf+download In PDF document text
    • http://files.createdheavens.com/uploads/1/3/1/3/131380063/9ddc7.pdfIn PDF document text
    • http://fenula.mcfcconference.com/uploads/1/3/2/6/132682787/dotidawo-kakikuxewusitaz-vuxut-rikatikes.pdfIn PDF document text
    • http://files.ultimatehotspringsguide.com/uploads/1/3/2/6/132695401/8764602.pdfIn PDF document text
    • http://files.naturetherapyonline.com/uploads/1/3/0/9/130969428/zanimituf.pdfIn PDF document text
    • http://files.seo-beastmode.com/uploads/1/3/1/6/131607712/sapakuvat.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/1/0437/6333/5326/files/94765125428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/nenepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5240/7704/files/wifixupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/rijegogalerodon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/mazatuwaser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/folona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/kewefexewejazeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/vikixufopige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/present_perfect_affirmative_sentences_exercises.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_off00005b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4F 5544 bytes
SHA-256: 6b3421483250048c6cd8379b2e4fe2d910c4132a4df72c575661e106ddf7c657
font_01_sfnt_off00006e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1E 10640 bytes
SHA-256: 9d6241ab444eacbe9784a073880624d1aba501d06ae83e38a07df777166b102f

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