Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93392a34f15ceef…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 10:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2bdca1a62ff5abc7f8368cebf424a9f SHA-1: 994655986debb24e9de4572786ad37a57b06c020 SHA-256: b93392a34f15ceef2d4b885eb6dab0db7036e1a640f8c3d408fb0688672eeaac
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=michael+parkin+microeconomia+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. 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.ru/wix?keyword=michael+parkin+microeconomia+pdf
    • https://static.usrfiles.com/ugd/b8c837_12985fe92d964c679b808b2fc07d15e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_67f954714fd845bf9e5cb4d42bc17c94.pdf
    • https://static.usrfiles.com/ugd/b8c837_f190770c6c074c80a9063f0f03d98476.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab0144739a854d39b2ad3fa62464932d.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/bose_soundsport_android_vs_ios.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/contractions_worksheet_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/roxigapavovijutureloso.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bda2b2792294a46a4d80023fb5bdc56.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e925401a5154aba8108cc0fbf1d2b9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7504b0b7e3dc433197a63072daea3542.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bc6a4492a024c3e8a63f388d20d6214.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1af2c8f66e54d9ba9709ab0571ad208.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/hd_screen_z_app.pdf
    • https://cdn.shopify.com/s/files/1/0464/9202/5000/files/ck2_destroy_empire_title.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/acknowledgement_for_ojt_narrative_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/gupalifagaligo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/22_oxidation-_reduction_reactions_practice_problems_answers.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_off0000805c.bin
5789ad829db1156de0495ad5b2f7bfc5bc0a55e91b2a5af3317d0959dc99328d
pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 5288 bytes
font_01_sfnt_off00009226.bin
c838caf6654a99c6a3847372122cb20f0de41218a86897a2a7988126d001cdce
pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 10872 bytes