Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9851c84f7e4828d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-25 11:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f010759ee55c22c0dfd7cc645215f15 SHA-1: 3d9aa1ba3e41ba33f5d5110f16c534b3d5efc918 SHA-256: c9851c84f7e4828dc43e973847983cebc3600234fd2d722534028a654e2f2a56
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains the same URL and references a 'percentage calculator excel', suggesting a social engineering pretext. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs.

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=percentage+calculator+excel
    • http://fofub.purewhiteproductions.com/uploads/1/3/1/3/131383483/4595230.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/73410014284.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/95601170491.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/cissp_shon_harris_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/redanemarox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/activity_diagram_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/favoxumemagafebeme.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/ranoxesij.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/34502231613.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/29541751291.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/60823114120.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/programa_arquitectonico_de_una_casa.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/data_analytics_made_accessible_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/rugodiruzuzoj.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_off00005c08.bin
66e5f19b1011ad54c22c8b0685d9ec24c34e0379445fa9670c5c4eaf0a7dfd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 4860 bytes
font_01_sfnt_off00006c9b.bin
42f39a8a2abd60c47903119d86fadde65cec1cbb7742bb31a67e6f49bc754ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9B 10212 bytes

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