Malicious PDF — malware analysis report

Static analysis result for SHA-256 338a17780e059d97…

MALICIOUS

PDF

38.9 KB Created: 2020-08-11 15:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b9d71a837ddcde3d47ab23c0499ed5 SHA-1: 464a5815c55552af17bf164a83dc52a3dbccb251 SHA-256: 338a17780e059d978a441729797f815cadb92d7ebe4207e289f57ce4fa5e2757
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the intent is to redirect the user to malicious infrastructure. The presence of multiple Shopify-hosted PDF links, some with benign content, is a common tactic to mask the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=types+of+interest+rate+derivatives+pdf
    • http://files.quadrysteria.com/uploads/1/3/1/4/131453990/8323f8753bab9.pdf
    • http://ratip.adventuroushabits.com/uploads/1/3/0/7/130776885/sezetuma.pdf
    • http://files.isleinterpret.com/uploads/1/3/1/4/131437515/b6cb6.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/88353602622.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/22549071827.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/roblox_gun_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/25388445708.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/soal_aritmatika_sosial_kelas_7_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3739/3049/files/statistical_significance_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdf
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/chylous_fistula.pdf
    • https://cdn.shopify.com/s/files/1/0432/3465/6423/files/vupuruloxojatibunowex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3838/3007/files/mefeloxuvetala.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/circular_motion_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/41329401355.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_off00005cb6.bin
2b6a231bee55ae42d800d418aeb25d60e83e5218230cf9e64b646c6efdfa26d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB6 5116 bytes
font_01_sfnt_off00006e32.bin
b2e4c61d77249adddac797a66326e34d22387c0d438d3d584591607f9243c0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 9580 bytes

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