Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9c911f0e5699d1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-12 15:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d21c2ac3ae3558c664e375e4a1ce7d9f SHA-1: cfc0f90ad404336d12f899a4d53be8fc13c11c86 SHA-256: da9c911f0e5699d11cd5fa491e11779fad1a7de4fb343b1929e78b7a8f39129a
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL that leads to the redirector, indicating an attempt to lure users to malicious infrastructure. The presence of many links to Shopify-hosted PDFs suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

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/wb?keyword=comparing%20sexual%20and%20asexual%20reproduction%20pdf In PDF document text
    • http://files.revolutionuganda.org/uploads/1/3/1/0/131070712/65e23e262.pdfIn PDF document text
    • http://files.frontporchimports.com/uploads/1/3/2/6/132695387/mizuxukiwimipor.pdfIn PDF document text
    • http://files.oakgroveunitedmethodist.com/uploads/1/3/1/1/131163836/2510940.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/1/0433/9902/0696/files/823451237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/gexozovoxapezuvoboxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/honda_gcv160_pressure_washer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/66638566297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/risk_factor_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/69618768633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9734/8514/files/85532510550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/nemanokimasanomigojim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/86841340222.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_off00005d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5448 bytes
SHA-256: 4d27fad55835b6705ebca5270348899d889eced4333ddd2b3c61500b33b97d17
font_01_sfnt_off00006fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 11268 bytes
SHA-256: 98724f908ace134527b9eafb1ea83bc3f49390530b0ee4d52bf6bbcb0ce8a0cc

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