Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf9f64e60740bcb…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 06:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c1041af33d2caf835b86062faec90e8 SHA-1: 082d6051ff9c762c0d8948e77105e8d95c32bf1d SHA-256: cbf9f64e60740bcb90ed57435f1925e691d8cdbe41213c97e1bc51778d685bae
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link 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 text related to a song download lure and the redirector URL. Additionally, a critical heuristic indicates a PDF link farm, with many links hosted on Shopify, suggesting an attempt to manipulate search engine results to distribute malicious content. The primary attack pattern involves luring users through a fake download offer to a malicious redirector.

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=tere+bina+jiya+jaye+na+song+free+dow
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/daludurolimoled.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/78340915065.pdf
    • https://cdn.shopify.com/s/files/1/0428/2944/7335/files/focus_group_report_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/sedgewick_algorithms_in_java.pdf
    • https://static.usrfiles.com/ugd/b8c837_acf7e84155ca4fe594712a62d09d1253.pdf
    • https://static.usrfiles.com/ugd/5ecadc_616b63647ea546149c00f86796bb9934.pdf
    • https://static.usrfiles.com/ugd/97368a_389cacb5b5304ab9879cd951047aa029.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d787bbd8e0d44fdb1837c1c99718a4e.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_689922a8f9794cba9fd27ec8f06b1bc6.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/79893095244.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/xobomugemogonetewor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/the_cask_of_amontillado_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/ganapati_atharvashirsha_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/siartec_en_linea.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/zezufusokepavanurovonog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/gedikafivam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7732/0348/files/18534286064.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_off0000570a.bin
066c0514c137a4637c8bce68f11633d9da2b85abce30ceeae3754ebb01e17065
pdf-font-stream PDF embedded font (sfnt) at offset 0x570A 5108 bytes
font_01_sfnt_off00006881.bin
37bed3fb4c4964ae07e624e95ed162ce2b0254ed64210434d5e6bd4354453f97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6881 16068 bytes
font_02_sfnt_off000099d8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x99D8 4324 bytes