Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2067a51b3ae623e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 08:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dcc8c1277da1d7077c906804ee3d0b SHA-1: fe1294b05a660e26d4261b80bd3ae51ba1383d96 SHA-256: a2067a51b3ae623e21f89ee9b09519d5c24d861d8722ccc94156eb658179ba61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=how+to+join+voice+channel+discord'. Additionally, it features a PDF link farm with numerous links hosted on Shopify, with one prominent example being 'https://cdn.shopify.com/s/files/1/0433/9413/8277/files/41798572112.pdf'. The document also contains a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The combination of these elements indicates a social engineering attack designed to lead the user to malicious infrastructure.

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/wix?keyword=how+to+join+voice+channel+discord
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/41798572112.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/dotavakuselorux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/kugavasax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/drawing_software_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3016/files/fatudomazurovejogilupapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/autodwg_to_dwg_converter_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/38559582925.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/nonawobifoket.pdf
    • https://cdn.shopify.com/s/files/1/0429/3214/2243/files/asc_740_10.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/michel_foucault_arqueologia_del_saber.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/lagiwifobusosokitaxokap.pdf
    • https://cdn.shopify.com/s/files/1/0440/9255/5416/files/teleragepagutojagage.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/jebatigajaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/english_business_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/xalimumigofixigivurena.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_off0000652d.bin
78493bc066aca42236bbd71fc269f1a42423942c654683305e9b8700746e4960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 5004 bytes
font_01_sfnt_off00007630.bin
75f4cbb09faa1d2af957fe5ddbfd9bdca3bae378d789265e8c6341bdba064090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 10196 bytes
font_02_sfnt_off0000990e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990E 4324 bytes

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