Malicious PDF — malware analysis report

Static analysis result for SHA-256 750861c76c773805…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 21:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49be5feffc8b07620ffab9990a7dbe19 SHA-1: 2b64bcc97bda77d81c3265b97e581a86cc46fcc9 SHA-256: 750861c76c773805b3dc61fa4250350bdfab8bd3481671f7064805fa400ca9ab
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm used to obscure the final malicious destination. The ML classifier strongly supports the malicious verdict.

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=churrascaria+plataforma+coupon+discount In PDF document text
    • http://files.ldgreen.org/uploads/1/3/1/3/131383981/2974974.pdfIn PDF document text
    • http://files.episcopalchurchonedisto.org/uploads/1/3/0/7/130739895/julusetiliwejo-nevadutijumud-niwikulobefeni-zupebewunesir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/how_to_delete_tumblr_blog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/network_cabling_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/dodisimokitulazegax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/traductor_de_portugues_a_espaol_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3562/1536/files/aprender_a_leer_dehaene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/54966096502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/glossary_of_human_resource_management_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/53951256822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/dekasegenometaxowewabubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/pl_sql_tutorial_free_download.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B9 5184 bytes
SHA-256: 2152c8c147c2f08fcf06cbbeb12ae4e9aa60867a7e1a9bef9e08ced11327d6ad
font_01_sfnt_off00006b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2C 10700 bytes
SHA-256: f8e44705be216e6dd934f81e82fbbb5814d383c72847d0a5eec1447227439e27
font_02_sfnt_off00008f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F74 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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