Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5fb2f26e636ad0…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 04:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8911cf6d3caf3dfcde54ec93d924edd8 SHA-1: 04647493aeb6e22eb120468df9f34495d24221cc SHA-256: cd5fb2f26e636ad0c40338bd9e945983724f830b73b743e8dc0f3e4888df4317
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=descargar+documento+de+scribd'. This URL is presented within the document body, suggesting a social engineering tactic to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign PDF files hosted on static.usrfiles.com, likely to mask the malicious redirector. No scripts were extracted from this sample.

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=descargar+documento+de+scribd
    • https://static.usrfiles.com/ugd/97aff7_a353d40c06384e4084dd2de6841a9c61.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1883669ff4c45148f125acd4cf4194b.pdf
    • https://static.usrfiles.com/ugd/10e3af_1a31e0ce66214963bf661788e75b2a6a.pdf
    • https://cdn.shopify.com/s/files/1/0447/9864/0288/files/ccna_200_125_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/zoregupitubogojafas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/tumufiwipovojigek.pdf
    • https://cdn.shopify.com/s/files/1/0461/0238/0708/files/zaposusimazosab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2689/files/bowakike.pdf
    • https://static.usrfiles.com/ugd/88a84f_551e2c0f405745778e212774ec1d8839.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a5154abc534d9fb684c0cba3385b6e.pdf
    • https://static.usrfiles.com/ugd/2f8cea_6dc9f8b2a0524893bd27cfaf22d492d1.pdf
    • https://static.usrfiles.com/ugd/3b47cb_4405c3513f2848fab1ce86baa812154a.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_off000062b3.bin
a53842cab418bb62339e951384ecbfd2ec1cb5a7da01594ae77020f8a863ee3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 5368 bytes
font_01_sfnt_off000074d3.bin
9a48f1f420d7ad8773c64d8f0f3384dba8babe82e6b19b5fa1ddd708eb694043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D3 11200 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.