Malicious PDF — malware analysis report

Static analysis result for SHA-256 c865ff3560478e23…

MALICIOUS

PDF

32.9 KB Created: 2020-08-10 21:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebc1055c35ce387cd99bfd7484f7ac4a SHA-1: 4f6083ed62ddb5f7dc5031cee010a8a2ffd75657 SHA-256: c865ff3560478e2385923686c0da40c70a98c1720f100dbe2ed3c29f2c374712
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. A critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=aeroelasticity+of+plates+and+shells+pdf'. This redirector likely serves as a lure to a malicious payload. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=aeroelasticity+of+plates+and+shells+pdf In PDF document text
    • http://files.chenangobluesfest.org/uploads/1/3/1/8/131856317/pavusizolotorozijo.pdfIn PDF document text
    • http://files.linnydvine.com/uploads/1/3/1/4/131453248/4714025.pdfIn PDF document text
    • http://files.onpapasfarm.com/uploads/1/3/1/4/131452958/fevivativar_juxanigobu.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/1/0433/8044/1238/files/16896335158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/83240448238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/sega_saturn_isos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/5555379131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/duzobolamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/42316807613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/23694681111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/48719157924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/84481705663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/toxebepesivuvikuguzivufon.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_off0000428f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x428F 5336 bytes
SHA-256: 32c2370be4d65395d2050c94489878938e5183d010bb09b13ad4dc8dfbd6c143
font_01_sfnt_off000054af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AF 10036 bytes
SHA-256: 74cec0024cf82ccb48e497db363b290b7c3501cdf9a31ac08b783b0d65801555

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