Malicious PDF — malware analysis report

Static analysis result for SHA-256 a782fb61791c885b…

MALICIOUS

PDF

50.9 KB Created: 2020-08-17 14:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 826d36d9544ce33ea30b244719c796ca SHA-1: 4d114d13f4f7ad2cb09fa1f0484dc87fbc29ba7f SHA-256: a782fb61791c885befa2a75980812d29c76c2922837db17b102bfd9b6df33dcc
234 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with one pointing to a known malicious redirector. The document body and heuristics indicate a social engineering lure, specifically prompting the user to install a browser extension or update. This is a common tactic to trick users into downloading and executing malicious payloads or divulging sensitive information. The presence of numerous links, including one to a malicious redirector, reinforces this attack pattern.

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.ru/pify?keyword=ant+er+for+firefox+57 In PDF document text
    • http://files.minipantos.com/uploads/1/3/1/6/131636965/7863924.pdfIn PDF document text
    • http://files.mykhalid.com/uploads/1/3/2/6/132681544/givaki-wogasewibe-buvejari-gopotigoze.pdfIn PDF document text
    • http://files.toprodbassmasters.com/uploads/1/3/0/7/130776175/wufonefixo_jiduburor.pdfIn PDF document text
    • http://files.blinganbeautiful.com/uploads/1/3/1/0/131070374/buwulutuf.pdfIn PDF document text
    • http://ruwalupop.juliehui.co/uploads/1/3/1/3/131383544/pupabopu_jamozuburukuzav_gavipizuminajut_metagewet.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/1/0434/0652/4583/files/kalnirnay_november_2020_marathi_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0723/8567/files/sda_zulu_hymnal_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/bosuxabizujelanetumomazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/gaverikexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3471/9909/files/mepowonesupibuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/buwogokusonuzejan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0614/7229/files/govub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/sorcery_in_the_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/berewara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/easy_way_to_speak_english_fluently_free_download.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 7

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_off00008a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A15 4600 bytes
SHA-256: 7a30705dc068c75bfc97803296208cfdbb6ea2f6ee484b0a1ee4fa75eb5d576d
font_01_sfnt_off000099de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DE 11412 bytes
SHA-256: f5f699317c2b4a321d685db1813cbab7c467fc5c6e7aa5e471ce8a9b8140b1e9

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