Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d5b97c17e7fbd7…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 00:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834ee2770e934fee24d9176e7d7848a4 SHA-1: b9e99f2400d7e0b29a00d40602211b17942e29fb SHA-256: c7d5b97c17e7fbd76bf3eaec5a7aa9a1f8a002fb608b89752cd69c9bb4b61580
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=advertising+id+android+example', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous Shopify-hosted PDF links indicates an attempt to obscure the malicious redirector within a large number of seemingly benign or SEO-optimized documents.

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=advertising+id+android+example
    • http://files.appalachian-auditorium.org/uploads/1/3/2/6/132696117/4674541.pdf
    • http://files.awakeningsprayer.org/uploads/1/3/0/7/130775441/supurojinonune.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/zuzazurabalumopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/39594137611.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/technical_analysis_tools_creating_a_profitable_trading_system.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/tigawinitegufox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/fagazewatalofarivamase.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/le_royaume_betsimisaraka.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/colon_semicolon_worksheet_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/vatax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0965/files/kebibudukotakoxagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/complex_analysis_zill_3rd_edition.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_off000062c9.bin
d583850746227e516aa379c48c9ede53a91317822861f318de4e1ffefa5cba55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5396 bytes
font_01_sfnt_off00007514.bin
c413b947900d81e9509a5a3f5eab4a7ad2c076389ffe450bddc9f34e06085886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 10600 bytes

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