Malicious PDF — malware analysis report

Static analysis result for SHA-256 4923483484f92cbf…

MALICIOUS

PDF

46.0 KB Created: 2020-09-02 11:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fc33cacea236674f7ff0eb40f076a79 SHA-1: 9819922d91720fee2c901433e1ac80219df69d56 SHA-256: 4923483484f92cbf5ff6d27f384a72f1610d3a9f4c1f09867d9ad6aa0c56120f
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'inflation definition economics pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, likely to improve search engine ranking for malicious 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.cc/pify?keyword=inflation+definition+economics+pdf
    • https://static.usrfiles.com/ugd/4c1554_0f3750bffa4146198b88684be06fb395.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c02e5a3111c4e7e9eefd292d4b803fc.pdf
    • https://static.usrfiles.com/ugd/79e5df_ce12c96362f64ba4ac720a07f0b0848d.pdf
    • https://static.usrfiles.com/ugd/2f7815_d9f620ad724f49efbeee28ad3bcf44a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbcdd66fa46440fabbe87efdfb1d3b1.pdf
    • https://static.usrfiles.com/ugd/fb41f9_886216202bec4eb09210350a025261d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
    • https://static.usrfiles.com/ugd/3be3a7_396030ce014f45a2911fffc059de8207.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8e95e2013994364bea4f705c4d6cb64.pdf
    • https://static.usrfiles.com/ugd/09273f_7995ad2257ae4ccc9a7e47211a73fdf1.pdf
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/windblight_ganon_dlc.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/79124826559.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/92159713644.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/ximapa.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_off000075f9.bin
02bff4b1f64a33404c08b7c3df953a33e0a5c8485a206305f4b716d06b146d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 5144 bytes
font_01_sfnt_off0000876f.bin
23a5fbd53728d167a235f8357b86b35f576ad18215f35d093d5c8a76f72f8f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 10496 bytes

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