Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c9ed1e6efe4d63…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 03:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5d35fecbf40300e410b2d4080bc69dc SHA-1: b6817f0fcdb0ddb3bbedd64e3a4e698922d761ec SHA-256: 40c9ed1e6efe4d63f9566f9cc67316378b2af8d0b7e79fe334bf6ce5e7835522
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a search-engine-optimized keyword. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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=night+mode+developer+options+android+9 In PDF document text
    • http://files.vcmg-us.com/uploads/1/3/2/3/132302732/fukekozosesibodine.pdfIn PDF document text
    • http://files.millsupportzuid.com/uploads/1/3/1/6/131637640/635d4c57de57e98.pdfIn PDF document text
    • http://files.navarrehigh.com/uploads/1/3/0/7/130738501/38673776e.pdfIn PDF document text
    • http://files.artisancenterdenver.com/uploads/1/3/1/4/131437563/c25d2.pdfIn PDF document text
    • http://lovubemo.tataspierogi.com/uploads/1/3/1/1/131164394/58269975.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/1/0429/8774/9525/files/ruxozovajapaveniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3726/8900/files/64149222805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/53385579343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/kijawapibudisejamigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/41899929124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/xituvexegavefolim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/piwusijawov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/brucellosis_in_humans-_etiology_diagnostics_clinical_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/73384417404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/28455386386.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_off00005f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 5556 bytes
SHA-256: 0dc7bf9bc65277bd7d463d2b0dcdc370d0f04661cc26c23b9813bf2fc749e720
font_01_sfnt_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 10420 bytes
SHA-256: b4bbd9d14d36ccca4a716f1d3e32529f50f96012361fd0fc1a919c41829e37d9

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