Malicious PDF — malware analysis report

Static analysis result for SHA-256 855cca2853ca4f23…

MALICIOUS

PDF

35.5 KB Created: 2020-08-29 21:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a32acd88f0820f1600e746eabfef9d8 SHA-1: b8f5d16c69b4901d47a31aa4ee92249fbf9adb13 SHA-256: 855cca2853ca4f2333e0a0de956a2edb05bbb153135d11a906ff62fa5d7f9546
120 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, which is a common tactic for delivering malicious content. The document body, though heavily obfuscated, contains text that appears to be a search query for a song, likely intended to trick users into clicking the malicious link. The PDF also contains a large number of embedded links, many of which point to benign Shopify domains, but the primary malicious link is the redirector.

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.cc/wix?keyword=come+home+sara+bareilles+mp3+download
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/84068389408.pdf
    • https://cdn.shopify.com/s/files/1/0435/3058/4213/files/southern_africa_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/wamomisutozaxefelaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/gupazijiredi.pdf
    • https://static.usrfiles.com/ugd/3b47cb_dde0ea7bd83240dcb1b670b1be678663.pdf
    • https://static.usrfiles.com/ugd/b91566_9098d16fa49e4bd099cc115e3c0f8db2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd3d900482cb45d59024eacf05b8b21b.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_cdd309938d274e70997c5c48375b20b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_614f1d280d8e403db046dc441e9ca659.pdf
    • https://static.usrfiles.com/ugd/b8c837_255247082a2043cfad4a63756a91029a.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/84590779690.pdf
    • https://cdn.shopify.com/s/files/1/0429/3663/1452/files/riesgo_biomecanico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/jinewiweloberirebit.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/84658487958.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/15063238747.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_off00004d8d.bin
9a5f7ccf3e805cf861232f226139c0c75cfde36d647e1c510dccd4fdb9c8f3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8D 5500 bytes
font_01_sfnt_off00006022.bin
8b4ebabc7f3792f52a818b06c80ed1962690eb85f4f289709bedf31fe97ec49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 9676 bytes

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