Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb67e4497a9932d…

MALICIOUS

PDF

39.4 KB Created: 2020-07-28 17:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4590359d7dfade9e0633af39e9f8086c SHA-1: 430740d093fb4042811f05f5e4e1c5e52dac28ce SHA-256: cfb67e4497a9932d2b04b63473454299eb654955403014dea438cd2a3f83ffe1
120 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, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. Another heuristic flags a direct link to a known malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to a PDF document. The document body is heavily obfuscated and does not provide further context.

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/pify?keyword=gurps+bunnies+and+burrows+pdf
    • http://files.columbushardscapes.com/uploads/1/3/1/4/131409170/fujawejelaruja.pdf
    • http://files.independencetelevision.com/uploads/1/3/2/8/132814147/8137547.pdf
    • http://files.oclegalnews.com/uploads/1/3/1/3/131378771/wefej.pdf
    • http://files.animalclinicsofthewoodlands.com/uploads/1/3/1/4/131407855/e001eb3.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/gewitabisopalavaxiwib.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/zabefevavudixatudizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/5963009414.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/1708939273.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/vadimelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/98855057761.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/zezopixonow.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/24509462822.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/65638752776.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/20254182686.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/dalowoliweja.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/
    • https://cdn.shopify.com/s/files/1/0437/9122/0887/files/59

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c32.bin
dadb855f8ad3f430eaf92d6f1622deb20a045852dcc9dca5187e5fce5766ae4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C32 5068 bytes
font_01_sfnt_off00006d89.bin
8af28b43d52c176e174c84bbee6e3268216e0567464c58d2d322839581f0a1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 10348 bytes

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