Malicious PDF — malware analysis report

Static analysis result for SHA-256 494bd2fc9708b387…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 05:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5dd1a8830273000240e9545bb5b8bf5 SHA-1: 3377baae18aa530083661dcaeb29a2652c588fdb SHA-256: 494bd2fc9708b3870d2d75e4f7eb777ded60810dde0c6758f761fcfd5d03d40f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as medical information, aiming to lure users to a harmful site. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links, including one to a known malicious redirector, supports this assessment. The document body and embedded URLs suggest a phishing or SEO poisoning attack.

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=bphc+full+form+in+medical In PDF document text
    • http://kitujum.andrewphillipschmidt.com/uploads/1/3/0/8/130874038/9261ed597a7.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/1/0431/7983/5547/files/titejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/mukuwukemuzoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/pmmc_ammeter_and_voltmeter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/52912027759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/safisusodunoxebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/bakerumorarupur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/nifaxapukarabujog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/principles_of_communication_ziemer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/71814252749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/depebeneribesexibuvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/nosuzegexatagaxowoxam.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_off00005a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C 5264 bytes
SHA-256: abd8e9d8f90c40910218079b6e0f772213891e62d8ebea48d7fd979b13c8e0e8
font_01_sfnt_off00006c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C36 9920 bytes
SHA-256: 92c7d1f608404349d8d7f550b86333c783629c97143e7535a3776658f5e48b97

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