Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf1108113e6fd09…

MALICIOUS

PDF

39.4 KB Created: 2020-07-28 13:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d938c031a173db51713a13abd8e12027 SHA-1: 84adf62f0987a1a7391dd5c8adc22e4f759c894d SHA-256: 3bf1108113e6fd09cc03f43256f66cb6ecbb88d178f89e85c8814987260d3f22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'clinical nutrition manual pdf'. The presence of a password-protected archive lure heuristic indicates an attempt to bypass security controls by requiring the user to obtain a password separately, likely to decrypt a malicious payload. The file is attributed to an unknown family due to the lack of specific indicators.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=clinical+nutrition+manual+pdf
    • http://files.porttouristpark.com.au/uploads/1/3/0/8/130814076/3155361.pdf
    • http://files.amillennialstory.com/uploads/1/3/0/8/130813777/zipuxedexosebereta.pdf
    • http://files.centroppsf.com/uploads/1/3/1/1/131164211/6c06abfa4.pdf
    • http://files.centroppsf.com/uploads/1/3/1/1/1
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/1382827320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/daxol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/gigiwajap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/toledawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/65747855920.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/62852128138.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/disujis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/vunebuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/87377844453.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/wavoxanenukivim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/xipowepaxudoranebi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/mijovofazexiw.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_off00005f58.bin
3c809d42cc3922f07a09b5b3813a4cf2ba8c1dfea4c1ebc6ac18d3e3aec9a736		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 4912 bytes
font_01_sfnt_off00006fe8.bin
207ac004e7f64dfaa17ea45ff6344656dce049fe8ee4281e0df31b07f95748ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 9504 bytes

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