Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3784528ac1c136…

MALICIOUS

PDF

128.8 KB Created: 2020-07-29 21:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d81d79992c22cbc4accb7da53257d7d2 SHA-1: 9e93995429a13f5f8c30c17db423d2b6154eb2c1 SHA-256: db3784528ac1c13606e77a6bc716e2239d295639303fd485ab04a0328a551a11
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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=logic+gates+pdf+class+12 In PDF document text
    • http://files.tracymgdesigns.com/uploads/1/3/1/3/131379939/ramupoxidi.pdfIn PDF document text
    • http://files.ninjateachers.org/uploads/1/3/2/7/132740511/nenewodufa_kejivipew.pdfIn PDF document text
    • http://files.lisa-cooper.com/uploads/1/3/1/6/131606331/2716873.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/1/0428/9835/8432/files/32878299647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/66080875711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/gafaxugakejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/gesisikiveji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/87319510152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/9755974504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3429/4937/files/xowukunijegepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/42660917617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/3442778453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/76038232223.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 2

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_off0001bb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB49 5032 bytes
SHA-256: 1d51e2357a74d5e3cd7da5d15c65e781a1080fbb6d45c1c48205bcaad769908e
font_01_sfnt_off0001cc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC80 13284 bytes
SHA-256: 92131e1a8ba08c3adca41eaac669fb2e20d188aae9b57b4908934d80cd4e0152

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