Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8c7f8dd75dd582…

MALICIOUS

PDF

40.6 KB Created: 2020-08-24 04:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b24103c8a0df44d07f31c5f981a5e1af SHA-1: e4dce57bb25fc1158b2998f8be32e927391a0ea5 SHA-256: 9a8c7f8dd75dd58215b092a2fe884a0e90bcbad36e734299802ac5014606259a
150 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, many of which point to Shopify domains hosting other PDFs, characteristic of a link farm. One of these links, however, directs to 'ttraff.cc', a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise.

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=picea+abies+nidiformis+birds+nest+spruce
    • http://zifon.iobcwa.org/uploads/1/3/0/9/130969950/7152418.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9780/files/77642513055.pdf
    • https://cdn.shopify.com/s/files/1/0431/1338/2044/files/23815425878.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/22759127992.pdf
    • https://cdn.shopify.com/s/files/1/0452/7046/6722/files/rawenadowowigejomus.pdf
    • https://cdn.shopify.com/s/files/1/0439/4899/8811/files/66063630720.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/64781741502.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/boluxuwidotapakile.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/xegunijijiwijipupofoler.pdf
    • https://cdn.shopify.com/s/files/1/0464/9435/1512/files/all_background_png_zip_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/63912371313.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/friendly_introduction_to_mathematical_logic.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/bilingual_education.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_off000060be.bin
3af16cb677804b247f15335f9aaad906809f2c5d31163d33881b09d637e50f4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 5408 bytes
font_01_sfnt_off000072f9.bin
764ba5d2e728ebfe63c9f111ed83da6fadaf98c9e7505a2ba5dc255115ba704a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 10156 bytes

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