Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0ef0472026170a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 01:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923154ccc39f0bd8646d33ae9c328cad SHA-1: d9bdc8ae16383b5472c2a32a585ffe19b1f90884 SHA-256: 4d0ef0472026170a3edef15f3b691aea435188692f6b467ade65a23655ab1aa4
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 external links, with the primary redirector URL being https://ttraff.com/pify?keyword=acidosis+lactica+tratamiento+pdf. This indicates a link farm or redirection strategy designed to lead users to malicious content. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity is the mass linking.

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=acidosis+lactica+tratamiento+pdf
    • http://files.cottagesineurekacom.com/uploads/1/3/1/3/131383247/dobuweruwosiriku.pdf
    • http://files.blackrockorchard.com/uploads/1/3/2/6/132683014/8127460.pdf
    • http://files.theamericanbeaner.com/uploads/1/3/2/6/132681985/furadagipitofo_gibeseme.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/41119493536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/siroxerexomukopurubav.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/sedilaxapuzakipamuxifota.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/16783777790.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1274/files/roruzikemijomem.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/mibaxemulamevajufulepuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/neninilevaso.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/zibo_737_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/vipejobaxofuwasel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/90138643898.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_off000064db.bin
76c11c4ff9fb5d05cc95f53d9ace8fadb72c947c2da13df40806382a9156a47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 5288 bytes
font_01_sfnt_off000076c3.bin
8c3f14687d4e98ce3aa2d82006fd54cf7cbd0a75999101d38b1c37f409ce21f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 10176 bytes

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