Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b938c16752be27c…

MALICIOUS

PDF

49.0 KB Created: 2020-08-07 14:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6ea3a7f9a7fcd7a7dce4a1c88e96a6 SHA-1: 6639a560c6e0648f2acf565c41afe2ec49c83fdf SHA-256: 2b938c16752be27c289e001c6f41b0b3cbb4b5ae495479790569bb1b0133eaee
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, likely as part of an SEO link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to lure victims with a search-engine-optimized document title. The document body itself is heavily obfuscated and contains the malicious URL, indicating a phishing or scam attempt.

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.com/pify?keyword=carbohydrates+msc+notes+pdf
    • http://files.theberchmansinitiative.org/uploads/1/3/1/3/131384359/rulajukat.pdf
    • http://files.millennial-pages.com/uploads/1/3/1/4/131437491/e9e04af07c83.pdf
    • http://files.workingdogo.com/uploads/1/3/0/9/130969053/bekabuliwajoku-balijikere-kufobilezag-doxosowino.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/luginidiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/sumupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/14190061371.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/38017070358.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/80382040880.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/58885079358.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/92053747284.pdf
    • https://cdn.shopify.com/s/files/1/0451/1321/3093/files/convert_asciidoc_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/wugunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/vujuje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070e6.bin
93ba7d9cf78357097e61c9869db17f82ef27c34779b8ee7ca40904524d13ccfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 5512 bytes
font_01_sfnt_off00008335.bin
cf58dd43b7055ca290241fe61df426c1b810446338c465eb2e35ccdbfdc4acc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8335 6364 bytes
font_02_sfnt_off000092d2.bin
6cb2ea9c716426daf0413fc2d26f6cb441232753a219c8c8f3d1a11cba549267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D2 10532 bytes

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