Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d8b84e7d312071…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 00:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 24ad3ae93b74383e98856b6a88096e9b SHA-1: 05bb91fdffc47b1cb5d6f2d87460e14da3aabb12 SHA-256: 82d8b84e7d31207163899cbbfb2aa8c111c96de9ec5077c29d70d01cfeb0bdd2
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to redirectors and SEO farms, designed to trick users into downloading malicious content. The document body explicitly mentions 'Pdf reader for pc apk' and includes a primary redirector URL, indicating a social engineering lure for installing unwanted software or malware. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's part of a phishing or malware distribution scheme.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wb?keyword=pdf%20reader%20for%20pc%20apk In PDF document text
    • http://files.storyspinner.net/uploads/1/3/0/7/130775728/6c479c.pdfIn PDF document text
    • http://files.nativeinstinct.co/uploads/1/3/1/4/131437563/5f97b61ae16.pdfIn PDF document text
    • http://jexoreb.goplaysport.co/uploads/1/3/0/8/130814423/ccb4616.pdfIn PDF document text
    • http://files.morganizephoto.com/uploads/1/3/1/4/131438313/dukijot-kurijol.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/1/0433/6392/6174/files/25789385395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/kibit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/cub_cadet_owners_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/32302145185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/65836530752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/ludowowaxigobapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/73908144961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/bijur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/boyce_diprima_differential_equations_10th_edition.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 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_off00006a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 5004 bytes
SHA-256: c62ae8c9d9ebfc32e67db61ee2569786139dfcd2182a87cb954db583996992e8
font_01_sfnt_off00007b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 10372 bytes
SHA-256: 8db144c298f7644dbb4239789caff78199c4d52c118ceb3a79c3ef343db21425

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