Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7ecc60346f4be5…

MALICIOUS

PDF

40.6 KB Created: 2020-11-07 02:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c5c36d52004d5fbb891e6f56eff8ccf0 SHA-1: d791a259eb6527007b76c04dcfa6c47dbcb654f4 SHA-256: 8a7ecc60346f4be5ecee5d96efb8439ade4197904ab38a69bedde94ce7ef01e1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is indicative of a phishing or malicious content delivery attempt. The heuristic PDF_SEO_LINK_FARM suggests the document is part of a larger link farm, likely for SEO manipulation or to distribute malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=a+group+of+pug+dogs+is+called In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5fa01faa2ccaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f9e5b033af44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f9357240378f.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5fa5de8e4fc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fa5dce58f264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f9c52fbe1231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zapawex.files.wordpress.com/2020/11/kavajuwoke.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/kekuvevako.pdfIn PDF document text
    • https://lidokofokaz.files.wordpress.com/2020/11/48665448125.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/21060392770.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_off00006128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 5312 bytes
SHA-256: 4ac993cb02132a07e19212bb4b28b757f1ceb79d9502124625e30148a5271083
font_01_sfnt_off00007353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7353 10008 bytes
SHA-256: 6ce3bb379b2e8bfb612219ee79ead6ca6bc8cd5562e7f9cd32554deb5a401dab

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