Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8ff78c4c3a737b…

MALICIOUS

PDF

45.2 KB Created: 2020-08-25 19:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 674fe876cab93d8ec1e13dfea7e37dae SHA-1: 40053ae0c66b7e91389b66ae68c4bcd74289cf2f SHA-256: fa8ff78c4c3a737b0cef6235d7a7bbccb7223a9e72d6c28d339433446523dc70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a lure for a book download, which is a common social engineering tactic. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, further supporting the malicious intent of redirecting users to potentially harmful content.

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.ru/pify?keyword=livro+completo+o+ultimo+dos+canalhas+pdf In PDF document text
    • http://wisuni.gordonandjulia.com/uploads/1/3/1/4/131407440/5816486.pdfIn PDF document text
    • http://virevus.studioentitas.net/uploads/1/3/1/3/131379951/6595143.pdfIn PDF document text
    • http://files.abmodelmaking.com/uploads/1/3/0/8/130874010/9901382.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/1/0436/1686/2371/files/kaspersky_internet_security_2016_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4924/2024/files/zodanufejovufajonobipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/vupoxowizejazenamiderod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6068/2139/files/96598362563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7069/2255/files/27354452550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3505/7566/files/wekuvaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/wovoririzusujaselopexubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/76283059237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/sominirixaxipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/order_of_adjectives_worksheets_for_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/volifakokonibifinu.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_off00006e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E95 5396 bytes
SHA-256: 5940a1c94e2e02e6f0d586896594a6b0ca35e86e76b37f863833384cfe8da82b
font_01_sfnt_off000080c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C0 12352 bytes
SHA-256: 4eeaecbfe1a3440eb42e250dfe3a9d83678d997a8bb14bcb62a1eb987a21c8f9

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