Malicious PDF — malware analysis report

Static analysis result for SHA-256 de23151fb509bfd0…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 15:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c374426cf490fc1fe54fcf8c12cbd205 SHA-1: 213d9bc4f658d9b63e03dd2bb1b6586fcbd78d40 SHA-256: de23151fb509bfd0fe5dedb6dd491469791e508be1a4dfe496629ead7cdcad94
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.ru/pify?keyword=catholic+social+teaching+book+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary lure. The extensive list of embedded links, many pointing to Shopify domains, indicates a potential SEO manipulation or content distribution scheme.

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.
  • 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.
  • 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=catholic+social+teaching+book+pdf
    • http://files.tracychamberlainstillman.com/uploads/1/3/2/3/132303310/9320510.pdf
    • http://files.fdryabc.com/uploads/1/3/1/4/131438471/depiworuku.pdf
    • http://files.westsillawarrasnooker.com/uploads/1/3/2/6/132680926/4547313.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/12745503007.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/bibiverigole.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/xewulubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/76090097765.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/environmental_biophysics.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/jafamobetavajubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/zelevipubodekimeluju.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/72249109651.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/67486966155.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/85767307381.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/14695943342.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632e.bin
b3ed5352b643a0628e9d0743006141936f64b0e35907bd0a4b48337124939a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5432 bytes
font_01_sfnt_off0000759e.bin
3896981723d8d0cd9857eeaa06cd44438bb23fcd1ba6e7542f712c3ec7ce248f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 10256 bytes

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