Malicious PDF — malware analysis report

Static analysis result for SHA-256 a361f0dfcda1194f…

MALICIOUS

PDF

47.5 KB Created: 2020-08-22 02:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ae62c751ee5a405100d7ea95f61876 SHA-1: af8094612abb7d4e83bac840b71d0fd572817b39 SHA-256: a361f0dfcda1194fc4f2a316b9f07600d8944758b18c5f53ad35492b43187973
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to 'Jai bajrangbali telugu songs', suggesting a lure. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, with one pointing to 'cdn.shopify.com' and another to 'rewit.krowncues.com'. The primary malicious IOC is the redirector URL.

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/pify?keyword=jai+bajrangbali+telugu+songs
    • http://rewit.krowncues.com/uploads/1/3/1/4/131437940/8458327.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/gubobesuvixilufoxunibodoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/bill_of_sale_form_car_oklahoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/90005916021.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/39755440491.pdf
    • https://cdn.shopify.com/s/files/1/0435/6213/9816/files/blewbury_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/90444827251.pdf
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/b._sc_nursing_syllabus_mgr_university.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/bitokexusinuwamenugumiwas.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_off00006464.bin
6fd6e5c7a1f50f192c12c0afbd3eff12369d1a9cee511f8df32ba5a7648c1e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 5056 bytes
font_01_sfnt_off000075a1.bin
a6ef21c2ad78d37ad5c231349ac92c6156793b4625dc7b9372cad27cb8d9fd27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 15484 bytes
font_02_sfnt_off0000a580.bin
e87d2aabe12a8651db5c3edfae103489ee1220fcf6d77b43838a53077c9475f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA580 3132 bytes

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