Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9126bd0feefd9ec…

MALICIOUS

PDF

39.4 KB Created: 2020-08-15 18:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe3f352d4a5838f2331fbe29b6e27bda SHA-1: 49334bf9ed53751d36d772d00514fc2b034e81d8 SHA-256: e9126bd0feefd9ec84db856fe68d16a651ef05609d814ed22d54adf77ba9d1fb
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the embedded links, https://ttraff.cc/wb?keyword=chess%20structures%20a%20grandmaster%20pdf, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct 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.cc/wb?keyword=chess%20structures%20a%20grandmaster%20pdf In PDF document text
    • http://files.americasschoonercup.com/uploads/1/3/0/9/130969404/8255926.pdfIn PDF document text
    • http://files.robynadair.com/uploads/1/3/2/7/132740586/pizunipiva.pdfIn PDF document text
    • http://files.expressfullhealthpotential.com/uploads/1/3/0/7/130739456/balarobajuvarivegi.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/1/0434/0183/8744/files/sims_3_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/ponejeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/79506094736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/snow_loreena_mckennitt_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/vancouver_bc_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9675/1771/files/52878688330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/wafovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/31055746676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/trx_upper_back_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/54042594958.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 4

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_off00005c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C04 5440 bytes
SHA-256: a8f207de2408b9dbf2ade93c5c0d3d9ea078c4f1134f8eb8d65ce0b1dc01be37
font_01_sfnt_off00006e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 10060 bytes
SHA-256: 41e2618788956d16a23b03a1f98d06bab21296ebaa130aeaabd5b78426a60b65

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