Malicious PDF — malware analysis report

Static analysis result for SHA-256 740db6ef269ac308…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 22:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85eedc7a10fed8d3b80941f2bbbdaa87 SHA-1: 2c183b8c6551f1c1b6a148f9575812fe69692b59 SHA-256: 740db6ef269ac308e8ef687ecddcfaedf7d6cc035e8dbea11f3093433b560341
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service, indicating a likely attempt to manipulate search engine results or conduct phishing. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to redirect users to malicious infrastructure.

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=enqueue+wordpress+stylesheet In PDF document text
    • http://pojezil.thefqc.com/uploads/1/3/0/9/130968921/5329299.pdfIn PDF document text
    • http://zarupiv.vincentsgermanshepherds.com/uploads/1/3/2/3/132302868/2926444.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/1/0433/9079/5941/files/ausable_river_michigan_fishing_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/66781262016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/zitudojura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/27342027576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/8119842291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/wozodudelisalugabuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/vixov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/29742137988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/10415738749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4457/7185/files/gb_whatsapp_uptodown_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/70707883740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/62406719034.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_off000064f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F5 5112 bytes
SHA-256: 5b2b13f5ebf9b2df997f6af5c8c44fe8b837a5eb6ae5c12a7701af8ee7af9a0a
font_01_sfnt_off00007668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 10440 bytes
SHA-256: 7d1665a349ea05daf68c8d8ebc92d19468e90ae56e91260c77addc74b9bf7ed1

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