Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad94d2ac127b1714…

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 17:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cfc5bafa0aa399c988d71241a0c97d2 SHA-1: 38ba9c74e3b928d180b51177c69a8e0c771bdeed SHA-256: ad94d2ac127b1714eb494b78260409cf593d81137022f5996fd3cc6bad843924
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a link that redirects to a malicious URL, disguised as a free song download. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for free downloads. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious 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.ru/wix?keyword=zara+phir+se+kehna+mp3+song+free+download
    • https://static.usrfiles.com/ugd/b8c837_c8177ee939264312bc87960bd83c0ff5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbcdd66fa46440fabbe87efdfb1d3b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_de9313b406d64784937543534630954f.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3124/files/sample_mba_recommendation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/polotaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7030/files/surface_area_of_cube_and_cuboid_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/zogejamen.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/8023458754.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/ejercicios_ecuaciones_de_segundo_gra.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/36680033978.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/xetofapufigimer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/47431131815.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/the_butterfly_effect_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0352/files/malazafevuvexam.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_off00004874.bin
60863fe4edaa51df50e99fa95d477a2ce0827b245f18ff6ea0618559fca59de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4874 5732 bytes
font_01_sfnt_off00005bde.bin
b449547c8eba66f301b229345bcd5e25060acb60417d943b9c2fa4b7863ecdca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 13728 bytes

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