Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ceb77207c449b1…

MALICIOUS

PDF

84.4 KB Created: 2020-08-14 19:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9a56380f927b1d45f5037a37a06ee30f SHA-1: 94941b627b5074575b8a30f9d213c8755a26f351 SHA-256: 79ceb77207c449b14f723d43db18f2a9b16a23347acb58c782bce4024ea757f5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating they lead to known malicious redirector infrastructure. The document body and heuristics suggest a "free download" lure, likely a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, potentially leveraging JavaScript for redirection.

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.com/wb?keyword=embedded%20operating%20system%20projects%20pdf In PDF document text
    • http://poriru.pamperandpreen.co.uk/uploads/1/3/1/3/131380213/zosipuvaposiso.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/1/0429/0828/7132/files/phorcas_letter_of_recommendation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/audi_q5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2465/8082/files/sowunoxejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/payroll_accounting_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/92045351804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/zisadomaxuwifuxutod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/lewixiwaxenawusepetavadop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/ximupatigadagarubekuxiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/bratislava_street_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/c_objective_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/le_boulanger_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/22105238705.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 3

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_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5720 bytes
SHA-256: 70d32eb2ea1368f60f0f5424e821a12e99cafd694703c12da70488e570ea2429
font_01_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 1952 bytes
SHA-256: 922c47e0ec4f2f735f6b739d39b64ee041b9e46e2eec7850f5ca67717fd54a10
font_02_sfnt_off00011576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 14952 bytes
SHA-256: 976a6aaabd788b3e346be9e560e8cb89cbde34a55201d244cb39dbe792ded60f

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