Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8c16b2fd28c379…

MALICIOUS

PDF

58.8 KB Created: 2020-09-01 01:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b17dfe640bffd993de1fa5d966b983c SHA-1: dbaf86eeedf33df3e7bc84646948565573c1efea SHA-256: 2c8c16b2fd28c379cc6145795e5a5431c79f80dcf8610b0d094c79f0b424fb2c
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for a book, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target search query and the malicious URL, indicating a social engineering lure. The presence of numerous external links, many hosted on cdn.shopify.com, suggests a link farm SEO tactic to obscure the ultimate destination.

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=arthur+miller+all+my+sons+book+pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/nufulolinadoxasumodem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/gonetavakobumezufiwum.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/15761141563.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/savabuvujobaxude.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/70015242143.pdf
    • https://cdn.shopify.com/s/files/1/0434/8739/6004/files/advanced_piano_christmas_music.pdf
    • https://static.usrfiles.com/ugd/837d34_28c4f7c8402b4805836facc9427f105e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f85d765a816a4ec080ce057d9bc9f162.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/sellers_residency_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/6303021184.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/fawomo.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_off00009a2f.bin
29e8061b3352cfa802fe5c8730f96172327697688df018252506444853088ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2F 5456 bytes
font_01_sfnt_off0000ac94.bin
12fad8876aa61ecf42acd252e9fb18fb3061ddba9e48094a2bc53198c0e0face		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC94 10384 bytes
font_02_sfnt_off0000cfe0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE0 4324 bytes

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