Malicious PDF — malware analysis report

Static analysis result for SHA-256 233731d7002bb0b5…

MALICIOUS

PDF

51.2 KB Created: 2020-09-03 00:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eac873152fd0a6220c293fc83c4b2c8 SHA-1: 91a2be58f31cf3e2f8455e00b7a6ff307394aa18 SHA-256: 233731d7002bb0b57db980c2dd021da9efd5c922e6af45681c1a705ab633788e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a domain identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the primary link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host a large number of malicious links. The document body contains garbled text and URLs, further supporting the malicious intent.

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.ru/wix?keyword=chunar+arijit+singh
    • https://static.usrfiles.com/ugd/0df15e_4e6dc9b5d4394b0daa12e345591771b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8813a76683e41758b0793fc6c1a0021.pdf
    • https://static.usrfiles.com/ugd/7ff653_a00e60367b9a4693a6bff7b756afcc11.pdf
    • https://static.usrfiles.com/ugd/b8c837_109163e0a77c40919393e58b29782ac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8fa0036ef7465ea804f506bcd2eca4.pdf
    • https://static.usrfiles.com/ugd/b8c837_20fe375843044a3baf5c702ce1fd4132.pdf
    • https://static.usrfiles.com/ugd/e78b77_1be12e2ccc664f5a8fc23abb39bf6884.pdf
    • https://static.usrfiles.com/ugd/01bc73_76e1459526c54255bb91ceb2095976ae.pdf
    • https://static.usrfiles.com/ugd/be19e1_57497c043c2a42f48d183486a488f605.pdf
    • https://static.usrfiles.com/ugd/a298ce_bdf1ba8edc1c4f4d96b373ba8582427e.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/jurnal_standar_akuntansi_keuangan.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/zetosoronazosimikupatuma.pdf
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/little_alchemy_2_cheat_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c4b3a04de30470ea87aeb24f6f73715.pdf
    • https://static.usrfiles.com/ugd/455f95_f0f1cd60363d41e58b0ebf351dbbb595.pdf
    • https://static.usrfiles.com/ugd/b148e5_6da3ed682fec4178994c692a3b44b26d.pdf
    • https://static.usrfiles.com/ugd/111c46_31d1a0381ed94cb0a95d480f62e3ef08.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_off0000696f.bin
3fac36c575094a4481ebe287aa7b783d4049f26e08f8df7de5a3f312e3d2d1b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 4896 bytes
font_01_sfnt_off00007a0f.bin
679ddbe4ce880498edb721ce7b7c0c6678d1439ebc503e22bf0b6ced6f295b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 16260 bytes
font_02_sfnt_off0000ac87.bin
dc293132238f42aa84f8546b2f9bd06dae44c5260bcb125ecba3321fe14f04a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC87 4936 bytes