Malicious PDF — malware analysis report

Static analysis result for SHA-256 0999091d17bd3d83…

MALICIOUS

PDF

38.0 KB Created: 2020-08-18 20:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f198bb0e0231fbcd9b31eed694fbab1 SHA-1: d48dc5741173f5d00bf9c278075ac816eca6b13c SHA-256: 0999091d17bd3d83729ce40ce48440609969dff78f26ec7c0c32e7227176d2fa
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically identified as a malicious redirector and an SEO link farm. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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.cc/pify?keyword=steering+group+template In PDF document text
    • http://files.tarotartist.net/uploads/1/3/2/6/132681938/8280551.pdfIn PDF document text
    • http://wazune.bignihchapter.org/uploads/1/3/0/9/130969723/jutarujabufimotolex.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/1/0429/8365/3535/files/41802486138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/chromatography_nptel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/brown_university_logo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/como_trabajar_autoestima_en_adolescentes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/zexowarewiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/pesawawopadele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6219/9200/files/lace_and_beads_size_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000588e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588E 5064 bytes
SHA-256: bf8a642422e9516c5d7c262b7f8949a7bae304f2101bfb70cb1ffb5312c52eeb
font_01_sfnt_off000069b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 9932 bytes
SHA-256: 912c56ba47ae4312fa3dedfff36dd1663fcf21297507da34675f640ee96c361f