Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84eeb8e8b8bc0a0…

MALICIOUS

PDF

33.8 KB Created: 2020-08-12 02:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87bb660674b8f9f95d091042620743bb SHA-1: b490f0ee73c751e33d425b0f7ff12c244c1808e7 SHA-256: c84eeb8e8b8bc0a0a7c85be1ce625b0d7db1998d5c36c4d01edb551edd5afe23
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 domains, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking search query, indicating a lure for users seeking software. The primary intent appears to be redirecting users to malicious sites under the guise of a software download.

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.ru/wb?keyword=nuance%20pdf%20viewer%20plus%20descargar%20gratis
    • http://files.thelighthousepreschool.org/uploads/1/3/1/4/131406749/9780771.pdf
    • http://bisawaga.rwandachallenge.com/uploads/1/3/2/7/132710621/doroxunovugas-zemumozi-pudoxebodi.pdf
    • http://files.poughkeepsiepopculture.com/uploads/1/3/1/3/131397946/2886862.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/viminevubiza.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/jodixexudigabomapewodudu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/dogamexage.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/zekikimujuxotirube.pdf
    • https://cdn.shopify.com/s/files/1/0431/4949/2384/files/nenekozeligidisuxiwud.pdf
    • https://cdn.shopify.com/s/files/1/0445/9646/1732/files/pukepolijar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/14375136760.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/damipigoduvizelasula.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/69394333182.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/85878307089.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_off000045d7.bin
fb1b7834399f9e9788510175b0c98366644902a12950d32c7367597cd750c959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45D7 5444 bytes
font_01_sfnt_off00005880.bin
565dc2424b02de44da4388589db06631d150731ab0124c4013ab32e206c6e2d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5880 9780 bytes

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