Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98c42abdd4a725e…

MALICIOUS

PDF

61.1 KB Created: 2020-08-18 21:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3400b8885af5cabc117a09ed3484f916 SHA-1: 14b4603f1c4158f2f236cc5fb81cfe0dbcf22c31 SHA-256: c98c42abdd4a725ea1d9c64ad6b34bb2d37acf86bdd648a7f5f775eadd8a6dca
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'LSE reading list guide'. The presence of a malicious redirector suggests the intent is to lead the user to a site that will likely deliver a secondary payload or initiate a phishing attempt.

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=lse+reading+list+guide In PDF document text
    • http://kepomoko.iacela.com/uploads/1/3/1/4/131437402/422b40f5b9.pdfIn PDF document text
    • http://files.pathfindersrus.com/uploads/1/3/0/9/130968949/c3ab19.pdfIn PDF document text
    • http://nusap.jacindaaytchillustration.com/uploads/1/3/1/1/131163653/1094056.pdfIn PDF document text
    • http://rabamor.conniecosbystewart.com/uploads/1/3/1/4/131438111/aae7b098d04.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/1/0430/2739/8807/files/bilurixatulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/aci_sp_4_formwork_for_concrete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/93458580944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/input_mapper_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/kinufasipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/voicemeeter_banana_echo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/41485763014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/14477370850.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_off0000b430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB430 4936 bytes
SHA-256: 75d2e7aa6a7276b1ba09722ab532e447a805ea64dd4a26806b716058cb7b3ad9
font_01_sfnt_off0000c4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FF 10120 bytes
SHA-256: f0621812f96d533eb2ea5dda12f7bb502797d0b4c77a898631ef99cbb8aad59e

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