Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a0d6fc1dbdbbe2…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 10:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb21d19eb9ffc529538c8c44ff011e3f SHA-1: d246bc81767e70089d86e8ca813124c7aa0fc7ab SHA-256: a0a0d6fc1dbdbbe2e9783899792c1063b45ed721691ca69f374da51fb1254a69
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a visual download button lure further supports a malicious intent to trick the user into clicking the link.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=druid+followers+to+deactivate
    • https://static.usrfiles.com/ugd/3bca44_bf83ebf2469b47048021f3ad34dd5ffe.pdf
    • https://static.usrfiles.com/ugd/0e2875_972086bed005411e8cc762db1161f44a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a1035ac50134c5da3e49d72c27d05b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbf32c67fcd438ebdac23d0626f80df.pdf
    • https://static.usrfiles.com/ugd/45fd81_e3b46929259a4c71909d4f58303447c0.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2643/files/1128516244.pdf
    • https://cdn.shopify.com/s/files/1/0440/8895/0949/files/bose_soundsport_true_wireless_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/sunetej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/19930599454.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://static.usrfiles.com/ugd/353d00_20005f0b76e04d1e9f719069099d5d49.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_e1c51bdc13b94d09bac46d1e76fe6909.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_off00006cac.bin
49e6d149a11487beead7594969329cf4eebec3b4854548c87ab26512c325be81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 5164 bytes
font_01_sfnt_off00007e68.bin
5d3e296c76405bf1cf5c31c6c21c3d9d3d75b0d3da2cfd9fb6e8c3a5b201bca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E68 9992 bytes

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