Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea182561d2b2ae90…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 21:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496b6d704a79eea040dc2bfe3d1f5200 SHA-1: f2ac3b002659122d5d18062687cfd359ed04c2de SHA-256: ea182561d2b2ae90aafe638e29f22c041343b84d8d615b52aa93187a67d66066
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with heuristics indicating it is a link farm. One of these URLs, 'https://ttraff.com/pify?keyword=cage+informally+crossword+clue', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity appears to be the distribution of numerous links, likely for SEO manipulation or to lead users to malicious content.

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/pify?keyword=cage+informally+crossword+clue
    • http://xavoloril.lebeausejour.ch/uploads/1/3/1/4/131407552/vumosuk.pdf
    • http://files.columsands.com/uploads/1/3/1/1/131164236/b2d1ed54e9.pdf
    • http://files.lakishawhite.com/uploads/1/3/1/3/131398544/lixamaduda.pdf
    • http://welelibim.avongrovecommunity.org/uploads/1/3/2/6/132680874/216af08f354.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/ruditovarewawurudixax.pdf
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/30892127998.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/81414318080.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/polikud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/42070818084.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/accounting_theory_noun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/wadogano.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/begoxox.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_off00006d24.bin
b9e713548df2ee39a26421bd252253dd0d1b606b2ca516ab17cfca21c18e056a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D24 5440 bytes
font_01_sfnt_off00007fa9.bin
e7ad7bd00074af3435f7668469ab9c70a820cec8f01535c6adf75b2adb5b707e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA9 10156 bytes

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