Malicious PDF — malware analysis report

Static analysis result for SHA-256 8264c13843e1e448…

MALICIOUS

PDF

51.2 KB Created: 2020-08-24 19:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d2c8b8903b1bec9874f3dd0d59628b SHA-1: a0643079ff607cae30cd86cbcc69c599e7dab7be SHA-256: 8264c13843e1e448f45b6d2e7c7d4519cc5108e10311babaedef6073587e8b11
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure. No scripts were extracted, and the primary malicious activity observed is the redirection to external URLs.

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=fireworks+first+aid+kit+piano+sheet+music
    • http://mumiko.justicecollaborativeatcornell.com/uploads/1/3/2/7/132740836/romososo.pdf
    • http://judojaz.nicole-phillips.com/uploads/1/3/1/4/131437626/d79fcdf54f.pdf
    • https://cdn.shopify.com/s/files/1/0440/3727/5813/files/5625047172.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/28534666705.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/80755281354.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/zezixamezaxivizosepop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/lepelefabikakitivuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/bojipisemotudomutet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3127/files/44325038675.pdf
    • https://cdn.shopify.com/s/files/1/0435/8609/3214/files/77410313959.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/ctet_marksheet_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7554/files/jedasapovon.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_off00007502.bin
6d0a161c061ced9dded2678e0cae6832ae141f5529bf17157f2f3c49775de40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 5472 bytes
font_01_sfnt_off00008787.bin
e76df3973716b299d0be1ec1f381231c566e38d9715ba3f61ea966540326276e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8787 10272 bytes
font_02_sfnt_off0000aaea.bin
b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEA 16100 bytes

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