Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6c0ab7fd9815e6…

MALICIOUS

PDF

40.5 KB Created: 2020-11-06 01:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b87217690dcdf6e7466137bed51987af SHA-1: 9fcca5f0a55c05bd079c27a1e7c019e768c90d73 SHA-256: cf6c0ab7fd9815e6656ee7ce4c41fa714d2090243589923351b667930cf6c65f
94 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, indicating an attempt to lead the user to a harmful destination. The document body, though heavily obfuscated, contains the same URL and a deceptive title, reinforcing the lure. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/123?keyword=secret+agent+handbook+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f89c4cb020a0.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/jenagetujisifom_dedurilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f89d548f1e7b.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/6160323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5f91a0be28764.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/jowafutexeseso-fifoxeweto-texoj.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/dc3f2b17-eb64-4c03-a186-4e7a8ca3103b/foretona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b788dd-82bb-4c04-95f3-8bb7cad1d603/lavokizimuvosepetimid.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_off00005e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 5476 bytes
SHA-256: a09238b6ecec54be92b9d9f75e63a66ef6c8790b9db35ba723f2b7eae15b4bea
font_01_sfnt_off00007107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7107 10928 bytes
SHA-256: 7b1eb30636d813a467b3f7163edba10f0990706ed9f0408fb9415a5d4a3e9241

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