Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98f0e8c84671e2a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 19:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e7432396cec2935bfabfbf6931c7c46 SHA-1: e2bf38393ab52faeb5a7415ac97e3dbf9d863cff SHA-256: c98f0e8c84671e2aef194f2d2f4f2804a223f68e682432e6695a087ac1639236
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The primary malicious URL is https://ttraff.com/wb?keyword=daily%20words%20used%20in%20speaking%20english%20pdf, which likely leads to a phishing page or malware download. The document also exhibits characteristics of a link farm, with numerous links pointing to PDFs hosted on various domains, including multiple Shopify subdomains. This suggests a campaign to distribute malicious content through SEO poisoning or similar tactics.

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/wb?keyword=daily%20words%20used%20in%20speaking%20english%20pdf
    • http://files.disneyadventurebook.com/uploads/1/3/1/4/131452958/81422.pdf
    • http://xikow.deitzhousemovers.com/uploads/1/3/1/3/131379552/genekuzujeb_pebutize_voduromadegofax_xukudegateximab.pdf
    • http://files.fromchristodad.com/uploads/1/3/1/1/131164260/1969183.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/91051418164.pdf
    • https://cdn.shopify.com/s/files/1/0438/2733/1232/files/78747591583.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/xemer.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0838/files/knight_and_day_2.pdf
    • https://cdn.shopify.com/s/files/1/0446/2352/8099/files/wutin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/guzeloxivepizemejafifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/56457602043.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/95060633577.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/71366193985.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_off000067f8.bin
c3829017cbbf1c3505028d9057475f273664d5facf4067223304bf01b9dbe371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 5560 bytes
font_01_sfnt_off00007af9.bin
ae1b3a89d4a3b950d06c4ed49b259718f44b1fb99b7b54c47a364dcf1acd358a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 10148 bytes

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