Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a4633a5ea78f0e…

MALICIOUS

PDF

47.2 KB Created: 2020-07-23 15:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fde449053e93c6655e06b540a395867 SHA-1: db99e9f86e17a1691aa0055cb141334a51bf90e2 SHA-256: 97a4633a5ea78f0eb1fe5bc7ed4e14403dc7a4a1ca674e0885804b6837f58542
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains known for hosting link farms and redirectors. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to distribute malicious URLs. The critical PDF_MALICIOUS_REDIRECTOR_LINK firing confirms that at least one of these links leads to known malicious infrastructure. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

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/pify?keyword=analytic+function+problems+pdf In PDF document text
    • http://files.wilsoninteriordesign.com/uploads/1/3/2/8/132814375/rolixajitot.pdfIn PDF document text
    • http://files.theaterdanceworkshop.org/uploads/1/3/0/7/130738607/d001413b65a2.pdfIn PDF document text
    • http://files.stonehedge.us/uploads/1/3/1/4/131453543/5401787.pdfIn PDF document text
    • http://files.sensibleshock.com/uploads/1/3/2/7/132740479/vasesejakukek_faxej_lelikam.pdfIn PDF document text
    • http://files.okeisan.com.au/uploads/1/3/2/7/132740458/pumibusodi-zeselura-viwewazev-zasowaribev.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/1/0433/0687/7080/files/fedixudarat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/tezafaderesalesizuzedak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/68445351039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/82476691217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/desimoniweladolabeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/lasuzulidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/66052336503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/gilunanovogogavuwojarejes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/21145807535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/sewawutedab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/64435116380.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_off00007938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 5416 bytes
SHA-256: d3389f8b49b653f3b2784a7fd4b03328f66bfb87d9d5867208c1a89c717ca597
font_01_sfnt_off00008b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B82 10548 bytes
SHA-256: abf479cbbf0ca74a182ca2f4dce4a1119163edd941ba4f0de589bc98c330614c

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