Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de73b4f201c8e8d…

MALICIOUS

PDF

62.4 KB Created: 2020-08-31 03:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf9dbc041d556ad966b09c70818bc669 SHA-1: 7a60d916b03f9d19c6cfcce391618f96e8b62800 SHA-256: 9de73b4f201c8e8d03bdf435f74d19d8bb503adf9c3e74fb526ce68a65622b7b
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is `https://ttraff.cc/wix?keyword=dictionnaire+mondial+de+mots`. The document body contains garbled text but also includes the same URL, suggesting it is intentionally placed. The presence of numerous external links, many pointing to shopify.com and static.usrfiles.com, indicates a strategy to obscure the ultimate destination or to leverage benign-looking domains for hosting malicious content.

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.cc/wix?keyword=dictionnaire+mondial+de+mots
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/6741898803.pdf
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/tajobevufokavewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/magunelesefi.pdf
    • https://static.usrfiles.com/ugd/b8c837_da641bfb739c4c13890db8ffbc1f5b1d.pdf
    • https://static.usrfiles.com/ugd/30e015_909b5105dc894d06974b463299116184.pdf
    • https://static.usrfiles.com/ugd/b8c837_378f41b42f414a37bd4cc1379b8527a7.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_eb8c9abd7176419c823a56e18ff777d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_4493b3712e744fbdae29f68889328556.pdf
    • https://cdn.shopify.com/s/files/1/0431/5037/7126/files/atkins_physical_chemistry_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0451/1780/0602/files/nunodiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/debolek.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/nemazozipisexotowez.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fab33ffbd2242a4bfabee423553eb03.pdf
    • https://static.usrfiles.com/ugd/b50c55_2f11afd2644d4fe7bfb39b8ac8546864.pdf
    • https://static.usrfiles.com/ugd/3bf302_b290118a1846492db3ea47aee12f134d.pdf
    • https://static.usrfiles.com/ugd/9374a7_3551b341a82e435e908597dbd26ef0a8.pdf
    • https://static.usrfiles.com/ugd/8a419d_41b691b74c3244b98a9e3e8f33be85df.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
stream_005_off0000cd8c.bin
11f352475dca1f40c8aa965bbffe33c097091dd4557b3f101573546459ef8f05
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD8C 18448 bytes
font_00_sfnt_off0000958c.bin
64e39fc0c8f0fd622fffabd19bc31ee25348dd2fabe3a07248d6c7733aa0708a
pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 5084 bytes
font_01_sfnt_off0000a6b5.bin
ef05a5a6135cf437c6852adcceae1ee18d51be707ac4e366d56dfe42a4447900
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B5 12332 bytes