Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b79982c56da916…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 10:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8d5cc51afdd38ddfbe40f6478b78989 SHA-1: 498060f35e5f1eab1628e5c7013741b5eae5b85f SHA-256: 84b79982c56da9165cf1cf65fede89b5a62240281920c08b89ff7d4532cd551e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract search engine traffic and lead users to malicious content. The ML classifier strongly indicated maliciousness, reinforcing the interpretation of these links as part of an attack.

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/pify?keyword=documentum+dfs+guide In PDF document text
    • http://files.kwtintl.com/uploads/1/3/1/3/131379899/xizipuviwagozuvu.pdfIn PDF document text
    • http://files.heavenlyangelentertainment.net/uploads/1/3/2/7/132740270/8466287.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/1/0436/1689/5133/files/ronatubujevutexeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/ketogene_dit_rezepte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/pedelofeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/vagazivugogavapalepote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/green_day_holiday_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/bank_success_fast_preparation_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5974/8769/files/11486116150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/61048697642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/public_administration_and_disaster_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/jimelifuxafesisafewenape.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 5004 bytes
SHA-256: feefa62b4716e30544d522bbabe8eb57dd2e9a93ce3f0c03d8c3a142544675cd
font_01_sfnt_off00006b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4E 10164 bytes
SHA-256: a3a1cf5a1290189b10b730f8da0983a2ee33a76f466c40a33a8b70f4bbf95a11

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