Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d872b1cfb388e2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 23:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e91f86774b7451d9b67ed848a7aec22 SHA-1: f8950300f5921dfea2e1853720e22ff2afbdb7a1 SHA-256: b0d872b1cfb388e20993f54b406a68a0cf8502a6aafda2320119fedd69c575c4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the string '3d human anatomy atlas', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=3d+human+anatomy+atlas
    • http://nuxefab.davidagordon.us/uploads/1/3/0/8/130874575/zodaxexepepunuz_wejividutojeki.pdf
    • http://files.centrocha.org/uploads/1/3/0/8/130873870/7918256.pdf
    • http://files.1dayresume.com/uploads/1/3/1/4/131406258/7006865.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2407/files/46445505451.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/sopotifapogusukisimibewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/bojujurulitokizolodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/75337953624.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5317/files/fotatajejoniz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/nokarox.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/76707067336.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/42876936364.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/sofizu.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_off00006570.bin
68e3b286f54b0eb50fcfe91dde3ba70dc0ce903a57df3635c54af4069174e676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 4856 bytes
font_01_sfnt_off000075c3.bin
2cfc8d2b3715e1032fe3bf876bcececd1d763b6894fde7417d8d41d6b4481ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 10116 bytes
font_02_sfnt_off00009860.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9860 4324 bytes

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