Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a2a7c7737bea42…

MALICIOUS

PDF

42.8 KB Created: 2020-09-04 05:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b82dae342c787b66a1e4d1f8f24acc6d SHA-1: e82551a5066f5bb6c38832d022e3ab96a3534098 SHA-256: e0a2a7c7737bea421b541d7d40addf8affed951c985e03025970f5db406de794
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a financial report. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely a user being tricked into clicking the malicious link within the document.

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.me/wix?keyword=14th+finance+commission+report+in+telugu+pdf
    • https://static.usrfiles.com/ugd/d5cf39_8585d35c0d7644fabbaed17e06d53836.pdf
    • https://static.usrfiles.com/ugd/76aeb6_050f59331d224b7e9b9143e263d088f1.pdf
    • https://static.usrfiles.com/ugd/9fc8c3_e71135ca8dfe45fc8eb8abb93ae3516a.pdf
    • https://static.usrfiles.com/ugd/85c99c_5908ba36a4e64ffda7759dd2293717f3.pdf
    • https://static.usrfiles.com/ugd/e4ee87_5993301ec45b4f17aee691bdf4de1b32.pdf
    • https://cdn.shopify.com/s/files/1/0433/7742/6584/files/97077542538.pdf
    • https://static.usrfiles.com/ugd/1e8759_c6c5eba7166d4255ad480503d254926a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c745da03750044f99e6ccb6407b391d2.pdf
    • https://static.usrfiles.com/ugd/29c71c_35031050a8f84f9f8fdea0c5036dfb14.pdf
    • https://static.usrfiles.com/ugd/2f7815_abb34d371dc54c74bd96723830adf73b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0fd6ca95ad748b29772bbf24b52a278.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/bell_ringer_journal.pdf
    • https://cdn.shopify.com/s/files/1/0461/7640/3619/files/ben_10_games_for_ppsspp_gold.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_off000067d0.bin
5c61f152bd247c73e1af27832cded3dc36b8a4addb65ae44e0cb61004b63edbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D0 5616 bytes
font_01_sfnt_off00007ac8.bin
bdc9f4127332e8340e31ea80815365c544a188b67a490826e2ae46dd7eced6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC8 10340 bytes

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