Malicious PDF — malware analysis report

Static analysis result for SHA-256 422cfa451ff1253a…

MALICIOUS

PDF

32.9 KB Created: 2020-08-17 12:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdd369d24ca6014e4e9d45d3aeb9a640 SHA-1: 6532f7d794555601bfece948ff419f96b4483aa7 SHA-256: 422cfa451ff1253a137076af91c4c5e76de85734a2c2dbbf6b2ec2e0e691a994
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, characteristic of a link farm designed to distribute malicious content or engage in SEO manipulation. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=bengali+album+song++2018', is identified as a malicious redirector. The presence of numerous links, including those pointing to Shopify domains, suggests an attempt to obscure the malicious destination and potentially leverage legitimate platforms for hosting. 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.
  • 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.cc/pify?keyword=bengali+album+song++2018
    • http://dugemiwil.jaegercounseling.com/uploads/1/3/0/9/130969406/1211400.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/mathematical_analysis_by_malik_and_arora_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/58449135475.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/girozagaxawedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/pazagovasukawefojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/kirin_tor_emissary.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/social_media_marketing_benefits_for_business.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/wolfgang_amadeus_mozart_biography.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/toxek.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/7588721129.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/rudinenopu.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_off00004348.bin
4cb2954abefcb2bbd31dd929fc05a402bc8b65bcda2f0a3d6e67ad7036608bac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4348 5620 bytes
font_01_sfnt_off0000564e.bin
7c44e713deea7a4e02ee3b7293ab5be46d3df74d4cbb307aef4bff2ce19be28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564E 9612 bytes

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