Malicious PDF — malware analysis report

Static analysis result for SHA-256 758d0cdf14b8c76f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 13:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b906a0fa14c6743027606a425de7428 SHA-1: 16a6a16f21961cd648c6e2903ddf1811c94131c3 SHA-256: 758d0cdf14b8c76f3239a343684cac33443dfd366040e64d56aea47e8f66b5ae
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, https://ttraff.ru/pify?keyword=branding+a+key+marketing+tool+pdf, is identified as a known malicious redirector. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity appears to be the distribution of numerous links.

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=branding+a+key+marketing+tool+pdf
    • http://files.savannah-aerials.co.za/uploads/1/3/2/6/132682822/vafenelufemowe-norimemuzitim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/butterfly_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/67941930444.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/fafufepalenumiter.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/87717903978.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5589/files/57153666668.pdf
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/sezuletilegoripalafomuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/roxinonujide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/13268308991.pdf
    • https://cdn.shopify.com/s/files/1/0440/1093/0341/files/15873887713.pdf
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/ponesoruluwiso.pdf
    • https://cdn.shopify.com/s/files/1/0447/5496/0533/files/jelikazawuxalaveso.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/diramosuzofuwipaki.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_off000074e4.bin
0e6e96dbc5b455b202dfef5f3e860b7b3ce3ed2e8ae1a6ff158e9d9b3f4cf3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 5400 bytes
font_01_sfnt_off00008733.bin
a01e5b388b697d65743ebe0af7f0ab753c5dc15bcc27377d3a41706843e0c737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 10120 bytes

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