Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b14d1dae3c5e4bf…

MALICIOUS

PDF

42.9 KB Created: 2020-08-02 05:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4852baf9a7b9d01e9380efb783b782bf SHA-1: 10aad7f5d2c6d8d1121f2a7048187a5ca10c2605 SHA-256: 7b14d1dae3c5e4bf60f281813976fad05cd688aba11b157ab36d5229b2f4149f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of an SEO poisoning or link farm attack. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/pify?keyword=google+maps+comoc+hegar. The document body contains garbled text but includes the same URL, suggesting it's the intended lure. No scripts were extracted, limiting the analysis of direct payload execution.

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=google+maps+comoc+hegar
    • http://files.floridianfabrics.com/uploads/1/3/1/4/131482991/6023201.pdf
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdf
    • http://files.laplayaatthestrand.com/uploads/1/3/2/6/132682663/fexogobun.pdf
    • http://files.newportrecreation.org/uploads/1/3/0/7/130776682/6027777.pdf
    • http://files.cameronhutchinsonsstory.com/uploads/1/3/2/8/132814415/4540117.pdf
    • http://files.newportrecreation.org/uploads/1/3/0/7/130776682/602777
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/xewigitogifavezinosokidem.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/20970307656.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/knex_roller_coaster_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/sesejim.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/zitavelesidev.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/mutimusetolikegibukubaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/20648740832.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/lifetonujo.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_off00006836.bin
c17240efc4e8fdfbfc1182ad0d6a1e25c2ac664f9f933bbe8e39b573d03f9274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 5376 bytes
font_01_sfnt_off00007a5b.bin
31d1ebbf5ed7fce9111d92dfb211b3dd8aea5c751f37917264815f205382b296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5B 10648 bytes

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