Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f4aeb5774085cc…

MALICIOUS

PDF

62.8 KB Created: 2020-08-15 01:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c37dbeb9db566454160ff2cb19c3e68 SHA-1: df80c093a1701e4640a804b85860b981100d5464 SHA-256: 37f4aeb5774085cc73801a415b70f6e83a9a9c0f18fa6a83df590368864b8505
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=musical+backing+tracks', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous external links and a redirector indicates a social engineering attempt to lead the user to harmful content.

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.com/pify?keyword=musical+backing+tracks
    • http://luruvu.asianairspace.com/uploads/1/3/1/3/131380005/015c17283.pdf
    • http://kozewa.msoatucla.org/uploads/1/3/0/9/130969448/lizekuzuzofor.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/jexogimi.pdf
    • https://cdn.shopify.com/s/files/1/0444/2321/7318/files/xixisukosuve.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/31282989568.pdf
    • https://cdn.shopify.com/s/files/1/0440/7702/3384/files/wow_classic_field_testing_kit.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/puwunibutirevukinadali.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/6611099504.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/34003280604.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/87139611266.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/wipazisimididat.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_off0000b8c7.bin
11cdaa9b3d871903f5fe21e68814a1cf0842e5ff4f5cdc8ea45caaad1e32f204		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C7 5176 bytes
font_01_sfnt_off0000ca74.bin
a8d9cde8127421017206f2123a2ce9ca600cf8c7026b8832202bfdcacbe91346		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA74 10592 bytes

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