Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8d9948e77e8d7f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-12 08:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 83b6b539a8b3181573d86244644d896d SHA-1: b0a46324d0f6b97fc700143538c49b9ab6cc5534 SHA-256: 3c8d9948e77e8d7ffcdc085141a48850589e33b3b10a194dff029cfa4448208e
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs points to a known malicious redirector. The document body is heavily obfuscated and contains garbled text, but the presence of the redirector and the link farm strongly suggest a malicious intent to drive traffic to harmful content.

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=traducteur+anglais+fran%25C3%25A7ais+pdf In PDF document text
    • http://xikut.murrayparkcondos.com/uploads/1/3/1/4/131437736/konebi-ranizufaxod-bisib-tofafomid.pdfIn PDF document text
    • http://files.wiggleroom.org/uploads/1/3/0/9/130969904/deximila.pdfIn PDF document text
    • http://files.jennyclendenen.com/uploads/1/3/1/6/131607522/4352cea5cbf5.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/1/0436/5733/0853/files/43860500849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/koxetatawaxuvugulif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/kaweges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/les_amygdales_anatomie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/3359627503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/south_african_national_anthem_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/wapekujijaxuxejepaxomep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/piwiriwofiguludisenili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/zazonawezukuregofosakeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/77922527203.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 2

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_off0000485f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x485F 5456 bytes
SHA-256: 0bf9c46bd1e74fe1e4fc703819b1247bdb09a60dbca6bf7f2d36b061e0dc95d8
font_01_sfnt_off00005aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAF 10432 bytes
SHA-256: d85e4e3df3da49919da21f7d980b8df182492184c2d208c7df91d4ba576d6479

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