Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85999d247a1453f…

MALICIOUS

PDF

38.0 KB Created: 2020-07-29 20:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d12e79b15e88e92becd8ddfd11d782d SHA-1: bd35d37698c79a72759908a25540c3b8b24abbad SHA-256: f85999d247a1453fd8ac8cc16bcecaf3b1360cd90f4de0521f0317ff22945f05
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a book title, suggesting a lure to disguise the malicious links. The presence of a malicious redirector link and the link farm heuristic strongly indicate an attempt to direct users to 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=understanding+pathophysiology+6th+pdf In PDF document text
    • http://files.myececlass-growth.com/uploads/1/3/0/7/130740464/zojejava_dupareja.pdfIn PDF document text
    • http://files.christopherhale.net/uploads/1/3/2/8/132814241/lipuvoxagizep.pdfIn PDF document text
    • http://files.realblackwolf.com/uploads/1/3/0/7/130775747/garekelusago.pdfIn PDF document text
    • http://files.cowaysyahila.com/uploads/1/3/2/7/132740413/talepesegusozelus.pdfIn PDF document text
    • http://files.chandlertowingservices.com/uploads/1/3/1/0/131071145/1024254.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/1/0429/2670/2758/files/vugegaroforepitedidugoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/20380222687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/wozexotoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/54876672918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/neviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/43501421936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/18156852108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/10590837023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/62045011891.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 8

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_off00005575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5575 5336 bytes
SHA-256: 31e66a4641c811c51c5dfecc6a32ae9ec2c594fc4077f750f500f80c85e2121a
font_01_sfnt_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 9824 bytes
SHA-256: 9e8f928a0dac4df7af610c15d4161556adf96cd5ca713fe2cfc842d8c73be72f

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