Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4129d86c079699e…

MALICIOUS

PDF

35.2 KB Created: 2020-08-04 18:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80a9f3e7f1a5587ffab6979e41712ef8 SHA-1: 3f4cab6b2fbc7166f7267d2d14bce0a20c345b50 SHA-256: c4129d86c079699e1c0f2d1a35324279f54683b570742d52886eb49d42b37bf4
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a legitimate guide to Asperger's syndrome, but the primary link redirects to a known malicious domain. This suggests a social engineering tactic to drive traffic to potentially harmful content. The document body and embedded links are consistent with a phishing or scam 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.ru/pify?keyword=the+complete+guide+to+asperger+s+syndrome+pdf+download In PDF document text
    • http://files.chairelectoral.com/uploads/1/3/0/8/130814596/gakusivelegewuk-giperib.pdfIn PDF document text
    • http://files.timothykroe.com/uploads/1/3/1/1/131164476/kinidusaxapawo.pdfIn PDF document text
    • http://files.saintshaven.org/uploads/1/3/1/4/131438260/bawemevisakukeretig.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/1/0436/4802/4741/files/sasubiparuzukotobovuwepum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/6903757189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/mixogemasepimisebibin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/xudawinuzasabejujoxax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3256/7195/files/kegeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3776/1437/files/advanced_engineering_mathematics_5th_edition_zill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/68926536587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/43238388984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/bizoporufukazig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/88846344525.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 6

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_off00004baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAF 5712 bytes
SHA-256: af8dfc7a4f237604bbcabe5beb6b47887a265d4ec15ab5cfcf57bb27929ee6ee
font_01_sfnt_off00005f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 9556 bytes
SHA-256: 264a7f14e5b6c6fe2d1686eadbcb462c0f58c441bada24b9e434eaa690baf92e

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