Malicious PDF — malware analysis report

Static analysis result for SHA-256 adba5f3c61942803…

MALICIOUS

PDF

38.2 KB Created: 2020-09-05 15:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40c89b46e85eefb53ef5875091af282 SHA-1: 937d41a839d60461bbecffdda03293da9c99b2ea SHA-256: adba5f3c61942803f913fe1afc0c919a5e0b8abb810a2390cda9ff25039bb2ad
150 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 link farm hosted on static.usrfiles.com. One of the primary links directs to a known malicious redirector at ttraff.club, which is likely used to distribute further malware or phishing content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=babu+bangaram+video+songs++mp4
    • http://movies3gp.wap-ka
    • https://static.usrfiles.com/ugd/2ac701_207d4db0fe104e6783bccf10d393bc56.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1de735b99164c6f92ee577e3a35e538.pdf
    • https://static.usrfiles.com/ugd/64d889_a5b12d3bea7c42a888368c5dc5a3f880.pdf
    • https://static.usrfiles.com/ugd/f3cb45_bcce49377d28408ebbf34f327c8548ce.pdf
    • https://static.usrfiles.com/ugd/76dd3d_f46dd36f66aa49cdac9f3d3ef16c309e.pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/bobageribomovag.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3313/files/believing_is_seeing_observations_on_the_mysteries_of_photography.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/69811186147.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/1010007696.pdf
    • https://static.usrfiles.com/ugd/4d935e_2b7f7cfd784d4edf87b8ba37c3f0038d.pdf
    • https://static.usrfiles.com/ugd/74a852_2743fba3d47c47d69c48cb80f0e225c2.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_e822ffc56c3c4eeca079d5157077d8b3.pdf
    • https://static.usrfiles.com/ugd/234f58_84815333531b4d4aa89dd37bbc6cfdc1.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/sebow.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/calendar_format_in_excel_2016.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_off0000564b.bin
bb33172a538ba90e7f046b1deea522993e84cee6d9a6a852430bed325b2952f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 5584 bytes
font_01_sfnt_off00006947.bin
1f85f112767c994ed37c78a14f06aba127d891dccb971e799731f4c152cf2dbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 10040 bytes

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