Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e99a8bd338bf8a7…

MALICIOUS

PDF

33.6 KB Created: 2020-08-05 09:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 106c937f80fa5ba1b88242311cce2692 SHA-1: c0c64ec56ec5625584d91fd37528f38a9fd9ae79 SHA-256: 7e99a8bd338bf8a78a17c3fc7a502d4406a6245775a1c0af24ee8b1fffc69918
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to a redirector service known for malicious activity. The document's structure and embedded links suggest a link farm or phishing campaign designed to lure users to malicious sites under the guise of offering a free book. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL reinforces this assessment.

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=a+startup+enxuta+livro+pdf In PDF document text
    • http://ginalitiw.thisquietsiege.net/uploads/1/3/1/4/131453329/funulukadegasu.pdfIn PDF document text
    • http://files.westboroserve.org/uploads/1/3/1/4/131407214/tedogisuba.pdfIn PDF document text
    • http://files.myactionfigurecustoms.com/uploads/1/3/0/7/130776298/kozudumipo_lejebu_winotijo.pdfIn PDF document text
    • http://files.hopespringchurch.org/uploads/1/3/0/7/130775431/a71c8ba.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/1/0428/8849/5270/files/88160244001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/75886489648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/79853883630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/gonijifaxofolizuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/steam_download_stats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/kenutezefemofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4839/4143/files/xapinozipelade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/lejap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/76593553344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/radolupobovusuwozezumov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/98976468719.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_off00004767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4767 5152 bytes
SHA-256: d2f9bc2f0e9ff23eeef9f0cca49f18804a2fa74eb2c9628ecfc93bbee4207e69
font_01_sfnt_off00005905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 9608 bytes
SHA-256: 442144f23f1d8c516a4b53a4471eab51e9519bc1ec473b1e0de80c17d91a5951

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