Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1bd3e0be083a86…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 13:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0317212f00ba5d48fcc3e99038ce957a SHA-1: f59c134e47cfff19bbe20d710fe65cde78d83036 SHA-256: 4e1bd3e0be083a866bb0fe9b44f732e2f240c34c16ea3b201307e2ab68c28c25
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and heuristics indicate it contains a link farm with numerous external PDF links. One of the embedded URLs, 'https://ttraff.com/pify?keyword=billboard+awards+2018+best+performances', is identified as a malicious redirector. The document body contains garbled text but includes the same malicious URL, suggesting an attempt to lure users to malicious infrastructure.

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/pify?keyword=billboard+awards+2018+best+performances
    • http://turuxob.mgss.com/uploads/1/3/0/7/130739344/dabagadogifovodip.pdf
    • http://gevujuda.justinschmitztheatre.com/uploads/1/3/0/8/130814238/jesule.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/18964882576.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/16256488710.pdf
    • https://cdn.shopify.com/s/files/1/0432/6722/7811/files/rasetazunejujedomuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/dotib.pdf
    • https://cdn.shopify.com/s/files/1/0439/7318/1598/files/fisisutawesulinifokel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/2646135215.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/67003975842.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/zuxasameberotobixibema.pdf
    • https://cdn.shopify.com/s/files/1/0454/7018/7686/files/vokirojami.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/cheat_sheet_infographic_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/81420613891.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/73955448585.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/assetto_corsa_gt3_cars.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/kangol_flat_cap_size_guide.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_off000060d1.bin
a7a72a9973873344822803828c090d7cd1036f12f919f110c0e937bcb2733798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 6100 bytes
font_01_sfnt_off00007580.bin
3aeaee3ea7d318bb4baf9d0de95a890e84135e69b6bf12085b33ebfb6eee6a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 9876 bytes

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