Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3de1065d11bfa4c…

MALICIOUS

PDF

43.8 KB Created: 2020-08-26 22:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1bcfc09b9996e877a06a36023f327f28 SHA-1: 4ad1416e22752aae373b635a3f8a7e7d429ec726 SHA-256: f3de1065d11bfa4c7aaa5936bdf2e64fe15e66bf1231f60ebb476cb73b15106f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDFs, a technique often used for SEO manipulation or to distribute malicious content. One of the primary links points to a known malicious redirector. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious link farm.

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.ru/pify?keyword=evapco+cooling+tower+selection In PDF document text
    • http://files.offroaddemons.com/uploads/1/3/0/7/130776478/43804176e82c.pdfIn PDF document text
    • http://files.thailandbusinessbrokers.net/uploads/1/3/0/8/130874205/bilowifudixumi_golupufeluxokek.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/1/0430/3486/9921/files/codedx_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/72218692767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5110/5947/files/58435193217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8143/1195/files/bofapokixonavev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1995/0485/files/36299160220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/robisunatonaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3263/3495/files/20652133956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1257/0787/files/brainstem_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/41151971976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/add_prefix_dbm.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_off00006cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDF 5208 bytes
SHA-256: e7868c0be37d221b364f1c028d88db4d94aa0d9dedc27ace85a12fd26b46fa68
font_01_sfnt_off00007ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBC 10392 bytes
SHA-256: 61f1678580349157daaca2e2bdca9ba710794a8d0df7dd8816aef6a908f0adec

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