Malicious PDF — malware analysis report

Static analysis result for SHA-256 824f9affa3e30771…

MALICIOUS

PDF

37.8 KB Created: 2020-08-19 11:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6c897e01d47b2058b4c54d17a3ee43cd SHA-1: 1cf07dea187095ecc73492a4a6d10bac076ff452 SHA-256: 824f9affa3e30771b840bfb438fe9c9faefc7f0c790cd657add78b0996f322d0
194 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 a link farm designed to appear as a resource for downloading PDF files. One of these links, https://ttraff.ru/pify?keyword=descargar+angry+neighbor+3.+1+apk, is identified as a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

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=descargar+angry+neighbor+3.+1+apk In PDF document text
    • http://files.uqpalaeo.com/uploads/1/3/1/0/131070938/c19d9ce5.pdfIn PDF document text
    • http://files.theatelierllc.com/uploads/1/3/0/7/130775707/gotugilurewosinak.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/1/0431/2881/5783/files/bauer_bodoni_ef_bold_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/42767850673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0857/3091/files/arquitectura_barroca_en_francia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6945/7055/files/lopekuribopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/48126880216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7495/3124/files/binary_search_tree_implementation_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3511/files/pdf_auditoria_de_sistemas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/25640547066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/ballade_pour_adeline_original_piano_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B39 5716 bytes
SHA-256: 53769e781268b6b53cf34bf53819511f5f5710d156fb407c92f87b0328dcdfb6
font_01_sfnt_off00005eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000673d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 10280 bytes
SHA-256: 2207621f1b1e1edcd09c58089b80bf09765cf52bd91ebec9ba00f58a4c75d68e

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