Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca0bc0a9d638e9f…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 00:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a95698e2bec5d49a0f3a06c86ab18c4 SHA-1: 2cb3d1d8233ace4b7e406a162659f61b3d657ed5 SHA-256: cca0bc0a9d638e9fba75076c9ad35580da7bbe064c7dc8622bfd010336abb26a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=absceso+pulmonar+pediatrica+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify but point to potentially malicious content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to ascertain the exact nature of the payload beyond the redirection attempt.

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=absceso+pulmonar+pediatrica+pdf
    • http://gesogita.zoetrodd.com/uploads/1/3/0/8/130874601/6a39c3516c4a028.pdf
    • http://files.ltlfitness.net/uploads/1/3/0/7/130775735/0910086e.pdf
    • http://zivaridis.cconsultingsa.com/uploads/1/3/0/7/130739379/porixep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/19075726489.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/61143227338.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/lugadazos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/kabajodaratezek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/21729578109.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/26472402002.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/29284301613.pdf
    • https://cdn.shopify.com/s/files/1/0429/4380/7654/files/tumaczenie_zda_angielski_gimnazjum.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/canchalagua_propiedades.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/logavuxuzebiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/91989569385.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_off00005996.bin
87528d4585c7c8873f96c98d26b454044136fd5bcde99186937a71a19840afe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 5432 bytes
font_01_sfnt_off00006be1.bin
3c1e915a4193babc9091f282a29ad4710ae23221e53121d8a6614aa0f0344d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 10652 bytes

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