Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca8e12f1bae500a…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 08:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de5a8cdbd276f89eb720dc402fadbd58 SHA-1: 1ec0bbcd33058c24b16c5fc110ff0dd2895baeda SHA-256: 5ca8e12f1bae500aa10d42e60940b8bd81f32798d7099cbb5f615ee2146ceb04
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL and appears to be part of a link farm designed to distribute PDF files. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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://ttraff.ru/pify?keyword=canada+election+platforms+cbc
    • http://files.inachildsname.com/uploads/1/3/0/8/130814387/2715995.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/blowfish_algorithm_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/gololemaxukakowalejugikul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/wuxaxovapapuwam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/89831963472.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/oxford_discover_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7566/6073/files/ramosipatanuvokegisivufe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/54779134666.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/the_ritual_magic_manual_david_griffin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b7.bin
b21165e781491a8a53960cb282ae91741ffe6ffad3c1f66427b4ceb842052e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 5344 bytes
font_01_sfnt_off000072c7.bin
aa8ed6fd2e7fe00a65088db7ef92299efa77b9d671ac643c52e246b6c270d44a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 10248 bytes

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