Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdab82590bd7ffd…

MALICIOUS

PDF

54.5 KB Created: 2020-09-01 01:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cbe953be4a816aafcc9837c0b67d86c SHA-1: 58de447de29be254ac5672cc2ddcd665b6070857 SHA-256: 9bdab82590bd7ffdf0c5c0e8ea4aced9d4974e4ff0c20279b9082fb873682225
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.me/wix?keyword=automatic+control+textbook+pdf'. This URL is presented in a way that mimics a search result for a textbook, likely to trick users into clicking it. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted from this sample.

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.me/wix?keyword=automatic+control+textbook+pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/bruce_lipton_libros.pdf
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/worofuxusedipomokuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/92203920601.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/66242386944.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/88785607136.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/tugusisugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/99723384794.pdf
    • https://cdn.shopify.com/s/files/1/0437/5733/8776/files/64037786711.pdf
    • https://cdn.shopify.com/s/files/1/0435/6613/7507/files/doger.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/gupiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/proportional_and_nonproportional_rel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/febonevopes.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/salupojidutedisasinawasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/besorotorulubu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/67992328476.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/update_windows_7_ultimate_sp1.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006704.bin
98bc8c02d43dc7ae38ec027f88a2b8d2a4a57c3da6e0e1783ab5399b9a263cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 5384 bytes
font_01_sfnt_off00007939.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 2116 bytes
font_02_sfnt_off00008303.bin
9e97afc7f003f0007610de1913ede17cf96fc3aa9c15d45604e7a10be92c368b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8303 15040 bytes
font_03_sfnt_off0000b12f.bin
31d8ae24dc66ac43da326225da1c9cafb238977c2d450e198d37b4668543bb83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB12F 17168 bytes

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