Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b86ef7bf188aa…

MALICIOUS

PDF

40.1 KB Created: 2020-09-05 23:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 450caa211916ad928091a0aadc831267 SHA-1: 47d886d7cb9ce1a415e71a02570d96b5d8408f99 SHA-256: e40b86ef7bf188aa126635cf75be20c16f97a219b8dcec482f955f7085c7bcc5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'building images free' and includes the malicious URL. This indicates an attempt to redirect the user to potentially harmful 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.link/wix?keyword=building+images+free
    • https://static.usrfiles.com/ugd/9757e7_f887aba9e80644e9acc56a07e530d640.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7543a49c0ef427ab294ad4b80b9a20b.pdf
    • https://static.usrfiles.com/ugd/e643da_3803ced767374d35b9edf0b5dcdb2a7e.pdf
    • https://static.usrfiles.com/ugd/4fb05f_e495354f35964815915f88236e8ea905.pdf
    • https://static.usrfiles.com/ugd/9d7ad9_2734aba8f9744bff8e2518a62ccc1389.pdf
    • https://static.usrfiles.com/ugd/ecec20_e47ac94385194edb896b0da961300272.pdf
    • https://static.usrfiles.com/ugd/b8c837_0101ef8a9c1742d981a7ea29c01fd187.pdf
    • https://static.usrfiles.com/ugd/b444d4_8e99d86296874f5886f833e0a35c3abe.pdf
    • https://static.usrfiles.com/ugd/5ea691_995299265c9c4cbe8a87863fc63ef972.pdf
    • https://static.usrfiles.com/ugd/b444d4_d3d95cc1f9564e1187116f220b142f45.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_off00005fdd.bin
72915fb59afb1b7d8cf4b331686120a2db93706a7a2da4a457beca3d386fc950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 5276 bytes
font_01_sfnt_off000071b8.bin
ceaa5c7abc77b39638bcfa17fc1c84e5edbb4a839cf5e18faeaf8683861a6d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 10144 bytes

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