Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca98a5bea4e30b3d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 21:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc74184c715f899be50f1c7941bce696 SHA-1: 395cedc50799f3e8358b0bcf8db81d944e99e402 SHA-256: ca98a5bea4e30b3d14844f92c33bf3102628f9180b3d26e82ce8abc574cb576c
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a keto diet resource, aiming to lead users to harmful content. The PDF also features a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=keto%20diet%20josh%20axe%20pdf In PDF document text
    • http://falez.whatwouldateacherdo.com/uploads/1/3/0/8/130813528/vonigugupagux.pdfIn PDF document text
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdfIn PDF document text
    • http://files.revebureau.com/uploads/1/3/2/7/132710783/2379133.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/1/0431/0515/7282/files/noble_skyrim_sse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/elementary_number_theory_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9024/7829/files/126020174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/kazulavegevuzile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/lopafamevolifedobexekugaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/faselukedep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/yamaha_48_volt_charger_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/32813135668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/gojozanizofifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/71141139242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/kavakipepufepawimaveboke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/84173789528.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_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5116 bytes
SHA-256: ce9bea0ae75a9e3ae794adac0a5d426586696d4d0a9bb776f6cd2e273f84c525
font_01_sfnt_off00007869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 10512 bytes
SHA-256: 32f38f22e4ec359bd0aa8e0d74574b5321ca454e153185bf7cd25563f3ba497b

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