Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d95a2affc308e5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 07:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a06cfe3ea8c670fd9850aafc9f37079 SHA-1: 03d206f028e0d1440b6142cab52c3cb31d495e73 SHA-256: e9d95a2affc308e5d13144e5af685bf9d31494eea352449bd714ea4ea0f63fbc
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm designed to host numerous external links, likely for SEO manipulation or to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.com/wix?keyword=maquinas+y+equipos+termicos+1
    • https://static.usrfiles.com/ugd/b8c837_9e551826a3394389b3bcb35e37064770.pdf
    • https://static.usrfiles.com/ugd/b8c837_99cd530dd41948248b703be9429a89b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
    • https://static.usrfiles.com/ugd/0df15e_08aec6e22418485197cb4e4cffbc057f.pdf
    • https://static.usrfiles.com/ugd/83b1b3_14f93caebeb44019822c8386642d20c7.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_3b647ed12fdd4d9b8445ca1e8475ab0e.pdf
    • https://static.usrfiles.com/ugd/b4a829_8e8a57ea26784076b2a26f42774f9c94.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sakemiribukewud.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/xijon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/50361150172.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7289/files/clariant_annual_report_2013.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/mba_entrepreneurship_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/97926560577.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/colour_to_black_and_white_converter.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_off000066da.bin
cfa75e505b005720b5f5f4a7778d0f182050e6be3526de6a7ed50b8fb01a56b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 5216 bytes
font_01_sfnt_off00007893.bin
b03f687491e082d83fe1b4d75ea91a62f971c00b7e88e216ca44908d8117b7ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 11124 bytes
font_02_sfnt_off00009c76.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C76 4324 bytes

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