Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8aab5f365bd0f73…

MALICIOUS

PDF

43.2 KB Created: 2020-08-30 03:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fdf8e96ab574d6f04a1fafd0e8a2f3f SHA-1: 417d94865bb56faf186e6185fb0aa09f777c8c21 SHA-256: a8aab5f365bd0f7344d315951669d8d653d35902c370dc5dac1fbff22b5a53e5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious content. One of the extracted URLs, https://ttraff.cc/wix?keyword=indice+de+shanon, is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains some of these URLs, suggesting the primary purpose is to lure the user into clicking these 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/wix?keyword=indice+de+shanon
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/90800758895.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/14339781992.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/astro_van_repair_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_09334912cfe84fe58a2eb31cacd0fefb.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/interpretao_de_exames_laboratoriai.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/measure_of_skewness_and_kurtosis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21096031872.pdf
    • https://static.usrfiles.com/ugd/4d6844_17453a6d59c148dd9683f4061bd92974.pdf
    • https://static.usrfiles.com/ugd/9c0842_c03aa1faed9b4ed8a87f90e2a6aacff9.pdf
    • https://static.usrfiles.com/ugd/b8c837_dce6b614c31746b3a4c9b72b73c21fbc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca3.bin
01f02829fe36c51922734cf13b65b55b136bf74c9a59b73fab9068290438f234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA3 4544 bytes
font_01_sfnt_off00006bf4.bin
b1edc7a79e2293dd68b36e9a8ccd41ee227a7d7fdc0099c51f6b5039e4977a4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF4 11572 bytes
font_02_sfnt_off00009285.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9285 4324 bytes

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