Malicious PDF — malware analysis report

Static analysis result for SHA-256 25aacae3823eb35a…

MALICIOUS

PDF

45.8 KB Created: 2020-08-01 15:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633ee42728cf8b2e6b8a3a08d39a057c SHA-1: 212f4b315592689f485cd3368bf3418192a2bbdd SHA-256: 25aacae3823eb35a757a7cd234c14f3eb6a9b900aa0ec5dc9dfc37d7c83ebe48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body also contains text instructing the user to 'Copy to user', and a heuristic indicates a 'Clipboard command execution lure'. This suggests the document is designed to trick the user into executing commands via their clipboard, likely leading to further malicious activity.

Heuristics 4

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=copy+to+user
    • http://files.danielleguentherphotography.com/uploads/1/3/0/7/130775393/ridepafob_zamowiz_jaxitozibe.pdf
    • http://files.knipa.net/uploads/1/3/1/4/131453024/kikudan_sewoxipoturu_rizabuzu_wepev.pdf
    • http://files.schroeder-capital.com/uploads/1/3/0/7/130738548/cbb78f3d.pdf
    • http://files.coachmenowau.com/uploads/1/3/2/7/132741149/mefufimov.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/65357563745.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/pagaxavorajiletawizabuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/zesapobunup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/tewupefitawupevaniral.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/zimowobutujejobetopeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/93105962883.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/dofumirufukakuwik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/hunger_games_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/21250323080.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/momowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/vizuvivurarawuguluj.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_off00006aff.bin
e9b14aac0ee0c217567960cf9691afad931c90c1082a845e72c796c7b04cfe6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFF 4424 bytes
font_01_sfnt_off00007a2b.bin
e40ec73e7c85600b51ed98a398d906d642ee46c58202576755f4e03df871237f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2B 10080 bytes
font_02_sfnt_off00009cad.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAD 4324 bytes