Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e75ec9374802b8…

MALICIOUS

PDF

38.6 KB Created: 2020-08-19 13:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b6344bffc0119fc67cc9e9a2aab2c58 SHA-1: 6e9d4ccdb3c4240438788154f432c0d3d58f2271 SHA-256: a2e75ec9374802b81ca270b6a7a91c59095a7aa1201ddceedd76572cb8f6e86f
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link to `ttraff.ru` is identified as a malicious redirector. This indicates a likely attempt to lure the user to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence for a high confidence assessment.

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=turbine+velocity+triangle+pdf
    • http://files.ianlong.org/uploads/1/3/0/8/130873804/40290fa55.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/82984963827.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/81915638078.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/fojagebefibadolulimoxotuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/codewarrior_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0446/7530/1539/files/4116745221.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/49286752114.pdf
    • https://cdn.shopify.com/s/files/1/0434/7586/1656/files/daily_news_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/56230923049.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/bypass_megasync_limit.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_off000056f6.bin
3087d7c8250d5b06765311ce0e18fe8e99a9e81b0760ce228f0a78a3d589e508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F6 5396 bytes
font_01_sfnt_off00006966.bin
0e63a6afb8249e7b9c206c64ddab7493ec8a93afcda796fe10f3c1840b9bfbdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6966 11196 bytes

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