Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19adbc27cf69597…

MALICIOUS

PDF

40.8 KB Created: 2020-08-01 15:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bb34e9bc942901d3619bd00835948f4 SHA-1: 73f690652051af31eacddc7637cd932d62c01a64 SHA-256: e19adbc27cf69597b5d5153bfd856e819b215bfb62d92b904afbd3a2ee941d4e
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, a technique often used to create link farms for SEO poisoning or to obscure malicious destinations. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=national+lampoon%2527+s+barely+legal', is flagged as a malicious redirector. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a container for links.

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=national+lampoon%2527+s+barely+legal
    • http://files.gstroop4435.com/uploads/1/3/1/8/131871494/0bbb93f48e3.pdf
    • http://files.movementdanceandfitness.info/uploads/1/3/0/8/130813696/1391564.pdf
    • http://files.reefencounters.org/uploads/1/3/1/3/131379042/mepakujef.pdf
    • http://files.sewonandsoforthtexas.com/uploads/1/3/1/4/131406864/40e7c.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/27701007298.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/vijeloxexarupofuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/38079932803.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/17308781980.pdf
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/geradewugakomuzap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0942/files/tufuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/29408128090.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/poputolaxuzurig.pdf
    • https://cdn.shopify.com/s/files/1/0434/1327/4780/files/lufiximiluzujab.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/51002163078.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/valebi.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_off00005e0e.bin
119b6cf99397e3e915ed974643d341b9a48c8c60cc66bf48f1e269bf4229ce7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0E 5384 bytes
font_01_sfnt_off0000705c.bin
bc09d46f5377e73e8863dd6fea5a3b0065bb501a011ae6f3f9bd780b5e2517f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10784 bytes

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