Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1673168b586412a…

MALICIOUS

PDF

36.4 KB Created: 2020-09-01 14:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0be0ffce457cd98782dfaa12c9be4b SHA-1: 8145723a343021be48e43b426cb89c33f8ed9e7c SHA-256: d1673168b586412a4ad2d47346792f958d8eacbdb5f1d7e5b8911cf2301578dd
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to static.usrfiles.com, and a primary link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'facilities management budget template excel' and the malicious URL. This suggests a phishing attempt to redirect users to malicious content under the guise of providing a useful template.

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=facilities+management+budget+template+excel
    • https://static.usrfiles.com/ugd/05900a_f6e63fdfba6d4d3bad762fc7ebe9758c.pdf
    • https://static.usrfiles.com/ugd/96bf9d_0a6b1e1ef3aa464095506120f3a932a7.pdf
    • https://static.usrfiles.com/ugd/6da380_dc75590f79894b2c85fe1945d1b17c99.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_c903c9343a3745ff8ed99641aeea1583.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/42337367698.pdf
    • https://cdn.shopify.com/s/files/1/0439/5502/8126/files/pdf_file_reducer_100_kb.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/android_led_detroit_become_human_cosplay.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/51674286824.pdf
    • https://static.usrfiles.com/ugd/cfa91a_a3e150d79581422ba7dc593f56df9c29.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4c98390795049f68859e338efc7fd0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0575b038a9734f3d914b65e489cd4a48.pdf
    • https://static.usrfiles.com/ugd/e1c37d_0ca7b387a5564a02a0ed753231e0dd84.pdf
    • https://static.usrfiles.com/ugd/a382ee_fb6e569d8b21463d945099e637ca3494.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_off00004f56.bin
28fec210f8650179d2692f1e6889527f8855c136a77067fa220f5276ba764b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F56 5460 bytes
font_01_sfnt_off000061d9.bin
4326fd24c17508be08b84f146a5333bbf113df1c8d8e64da6f137b881c425510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 10244 bytes

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