Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8d6f08a457135f…

MALICIOUS

PDF

52.3 KB Created: 2020-11-05 20:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d0596be4ca8010182cbc778519c1bf5 SHA-1: e64754b22fecbd2177f8580ab76b84b6b0477627 SHA-256: 6d8d6f08a457135fe30ddbc567bea181b5149fd6371229014007f5b3b7e1e9b8
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a prominent one pointing to 'trafffi.ru', suggesting a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially malicious or spam-related content, likely disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=nwea+map+scores+chart+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5f9d76487622b.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ancient_of_days_cityalight.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/c3749bd1f6.pdfIn PDF document text
    • https://nuvetifozeg.weebly.com/uploads/1/3/4/3/134358797/2890364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8945d17167f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5fa083453cec1.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/21286467736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fa410667a831.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/54147045436.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2741603f-5dd7-4ac7-9f56-9521aefcc675/juwajisojalemuroza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2741043f-28e5-412f-bdd8-4d2687b2c79d/35728164049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e4e8a3-ddb7-44e0-844e-1152fdaea565/88760940823.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7733 2996 bytes
SHA-256: 580d3b2119da7a2f09650448cf856259755418258f914ba2ea140aa076d13462
font_01_sfnt_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 5356 bytes
SHA-256: 0de6f97e05120af8e36689dffdb5ca637275ec10bce8fb2a607573ea81b80e98
font_02_sfnt_off00009422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9422 11208 bytes
SHA-256: 991bb2d89d7dede40a278eb00df082f2ecdd91a2030abe60a2e451f2ccf852cb
font_03_sfnt_off0000ba82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA82 16076 bytes
SHA-256: 72b50ce8393e6665d617349b385eb0c2ebfa959cff1463be065fa2826278273f

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