Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec56349cd3ac0f60…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 16:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d75d196a0beeec3b38270852edf89d7 SHA-1: 9521e1cc086545c7dc663bd2ee20e4d6e5219987 SHA-256: ec56349cd3ac0f60c71e3947b2398f372eaa5ff3a1159618edad0dc29f2ada9f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a reference to a book title, suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to 'static.usrfiles.com', likely to improve search engine ranking and distribute traffic. No scripts were extracted, but the primary malicious intent appears to be directing users to a potentially harmful external site.

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/wix?keyword=common+stock+uncommon+profit+book+pdf
    • https://static.usrfiles.com/ugd/b8c837_17ba511e3fe34490b03dda5a5c6be9df.pdf
    • https://static.usrfiles.com/ugd/b8c837_876449ef327f4cc7a744b2149235bcaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad9a4e6550f345d6abef8dcb9285c6b4.pdf
    • https://static.usrfiles.com/ugd/1f5cef_e10520758638450ba546d1d7f8b5f6c9.pdf
    • https://static.usrfiles.com/ugd/3f80ec_6fbcf5cdb95b420fbdc37828d131e7e4.pdf
    • https://static.usrfiles.com/ugd/6a7407_a5159a50864c4026b16b6bb9ca784bea.pdf
    • https://static.usrfiles.com/ugd/b77b08_f1afeacb27b9401e87044c9db945fedd.pdf
    • https://static.usrfiles.com/ugd/7041e4_264a3a7b53374fe5a59d1a819e483aa4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f165b50ab104c9c8197b1a3a659bd3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c39a6b23f194591a91c3961e654bdcb.pdf
    • https://static.usrfiles.com/ugd/930050_b37383976f894dcea65a6f2862a2b02f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6165f694158d43ab92288a43d7f31baf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c074f97ce5614b67994cb249c05d89f5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006177.bin
3d877cb6a4fb34e89b27f12a3b49bacfebb78bfc8fb2c1f936927871a47133de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 5048 bytes
font_01_sfnt_off00007285.bin
45f94d3936e78c6b708212f18e68b7cae1c18ff86590194fc4f664aab5716c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 10048 bytes
font_02_sfnt_off000094db.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DB 4324 bytes

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