Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b99f00f5dcdc38…

MALICIOUS

PDF

34.1 KB Created: 2020-08-21 09:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b81f61cd7426a05d3e8aed1d6e32049 SHA-1: 0f0dc1518899a50e9dd1776f0e0516b0fb0bb0bf SHA-256: 80b99f00f5dcdc38dfbb016e1ebf39de42a52a37ca491abf04097133b5838172
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that point to a redirector service, which is a common tactic for phishing and malware distribution. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, likely intended to manipulate search engine results and lure users to malicious content. The document body, though heavily obfuscated, contains a URL that aligns with the malicious findings.

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.cc/pify?keyword=cadillac+xts+2016+manual In PDF document text
    • http://files.danielahdz.com/uploads/1/3/1/8/131871786/ba2361b4dcdac.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/1/0447/7878/2869/files/pathogenesis_of_pneumonia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/95293565985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9155/6504/files/23816747348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/equilibrio_acido_base_veterinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/xikadinadenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5221/0088/files/simezaladobetusedire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/todole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/cardiopulmonary_resuscitation_articles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/73881890198.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 1

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_off000047bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BD 5444 bytes
SHA-256: 6ad58b7b25571a1dc14326604cab1a99ed5fabbfe1e25df55b621c03ae0a6080
font_01_sfnt_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 9944 bytes
SHA-256: a9e7ce40d928151a59d30f6d045f9a9129c546cc8ce984429d295c885e08b83e

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