Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f740e13b03d200f…

MALICIOUS

PDF

59.0 KB Created: 2021-01-10 13:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 41dcc2db8abfc489dd63fe93ea0fbec6 SHA-1: a7d15e736e9552616a5dbf40b0abb00d74e8c078 SHA-256: 8f740e13b03d200ff4a238909d4445167e2b0b23783cff98463feea6483bd34b
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains links to known malicious redirector infrastructure, specifically 'https://gettraff.ru/wb?keyword=maxxis%20minion%2026%20inch%20tires'. The heuristics indicate this is a phishing lure, likely attempting to trick users into downloading further malware or visiting malicious sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9030

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://gettraff.ru/wb?keyword=maxxis%20minion%2026%20inch%20tires In PDF document text
    • https://nazoturifebigik.weebly.com/uploads/1/3/1/6/131606271/8718661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f9c6969d4600.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/H15ggeu/lizotuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5fbded66042d7.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/thgTicK/40547987575.pdfIn PDF document text
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/3138994.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/livemarovepari-novuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd63d7a7b24d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suxiweke/entrepreneurship_education_in_secondary_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/midomasukajolasesolezuto.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04B 5152 bytes
SHA-256: 0a4461fadff600c38cab47ce6d64c85c6cd1cdce9e4acc60986e7d438697208f

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