Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc9676ddf4ee6b5…

MALICIOUS

PDF

66.0 KB Created: 2020-12-08 07:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a17901086db0892992cdb8507ca546f6 SHA-1: ea9f2ad2278f428bf5440889a2dbd8d7f8959ef8 SHA-256: 6fc9676ddf4ee6b5b61d16ea63be0937b171aa8d1196804b6230720f7e530b69
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, which is designed to lead users to a phishing page. This is further supported by ML and ClamAV detections flagging the file as malicious phishing content. The primary attack vector appears to be a phishing lure disguised within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffmen.ru/strik?utm_term=angola+high+school+football In PDF document text
    • https://kukezuleji.weebly.com/uploads/1/3/4/3/134361302/nifexuv.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/9e9a2ccec3a4c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc660b9c6229360ecd248cd/t/5fc7e482ca81f31e47c03531/1606935684496/terro_ant_killer_spray_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf99564be903ae64006d8/1606220181298/vitoxisuwiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc7980cb2fa4660c8d9011a/1606916109580/malarudebeduxuvud.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/22048728128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e9d2f4-b399-47d5-8933-b633855a4aae/76069155982.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd308239b0722912b0841/t/5fc19c733c02f22b9d4a1a32/1606524020556/whale_evolution_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427bcd2e-f723-45fc-adc8-1eff3ff02e62/razogogoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0964f81c9a2a0c695151/1606289765352/film_trailer_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d691a13a450babf3b7c7/t/5fc9999e55485c3109ab87b9/1607047582323/65739033843.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D1 5176 bytes
SHA-256: a9cee6c16fe539541f916c6f77f9c8e7ea44efa55069b816c0cf0cd1ffd70e32
font_01_sfnt_off0000d877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD877 10328 bytes
SHA-256: 4225e79799941001ca8b889c6a63ee20329c44c476b59d301aca1ad197eafa52

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