Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4375188fcfadb7b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 01:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae99f59ea0abe527f391eefcd702c6cf SHA-1: 75dcc856ca0c3dd80e0de16a0dc1b25a8e214791 SHA-256: b4375188fcfadb7b1c1f24227625d0031fb3d5e490b469aabfafe7c0b2267fb5
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.com'. This URL is embedded within the document body, suggesting a lure to trick the user into clicking it. The document also contains a large number of external PDF links, many hosted on Shopify, indicating a potential link farm for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=rush+maya+banks+free+download
    • https://static.usrfiles.com/ugd/b7ed05_177afa62452c4d19897ccd63d5adadec.pdf
    • https://static.usrfiles.com/ugd/47b1e8_87c85498ff1e454b92448557e8549ab8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e20110fd41f4636b6ca4aa6395a8683.pdf
    • https://static.usrfiles.com/ugd/7c3584_dde3d74aea774707afbc28f015eec1df.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7049/files/hunger_games_weebly.pdf
    • https://cdn.shopify.com/s/files/1/0451/2812/2521/files/sejave.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/jusebibixarimuju.pdf
    • https://cdn.shopify.com/s/files/1/0439/2324/3176/files/79574522085.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/wedise.pdf
    • https://cdn.shopify.com/s/files/1/0440/5788/6870/files/54130021945.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/intermediate_accounting_19th_edition.pdf
    • https://static.usrfiles.com/ugd/7dd30d_5573b445344c41b5b728941447646b39.pdf
    • https://static.usrfiles.com/ugd/4c1554_fcf99d3afc784b189e6513c14b6de854.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_off00006bab.bin
eaa92471c302c4deb3e6aac5d719ce5cad32d4a376964a0cdd9933078353666a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAB 5304 bytes
font_01_sfnt_off00007d95.bin
049f68f59a0900fe81a3208778034ca238b75381c2bbf6547011d9c7e4062d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 10308 bytes
font_02_sfnt_off0000a0ea.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EA 4324 bytes

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