Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3106eaf7e9ddcb…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 15:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02e9692ecf0b5ce24a9605f8b3533c5f SHA-1: b409e505499f5ea3b90a69d04be8af205f5496c1 SHA-256: 7f3106eaf7e9ddcb13fc6969ae944223a01e9cda7ff2bf998bc7e615e6c2f484
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=the+flu+2013+movie+online'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

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=the+flu+2013+movie+online
    • https://static.usrfiles.com/ugd/b8c837_9279de599f68444c995f795baf3c8916.pdf
    • https://static.usrfiles.com/ugd/b8c837_260a36ff4bd146d7914a3785e69143f1.pdf
    • https://static.usrfiles.com/ugd/696b8a_aee79857ad59496594a3831aa520e882.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6844a4b257d4b7b931af6d53c87dc07.pdf
    • https://static.usrfiles.com/ugd/45e30f_1ad86744812f423abec5faf363607a87.pdf
    • https://static.usrfiles.com/ugd/c1615c_110be962652446f4807532bb9b43a0cf.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/best_java_programming_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/nimuwesulodevazeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/vorutugofosefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3614/6855/files/chip_och_dale_mbler_till_salu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/21469419612.pdf
    • https://cdn.shopify.com/s/files/1/0433/8427/5100/files/fuguvufaluwepopatiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/zajifidapodivizopekoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/verizon_mission_statements.pdf
    • https://cdn.shopify.com/s/files/1/0435/9795/5229/files/27726835996.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_off00005285.bin
1f620dd14185a1030e668dcbe42d2e53236b64613560a419d735d86ad9a21b2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5285 3028 bytes
font_01_sfnt_off00005d6b.bin
5b468a1630f61d0da8cdfce02f2e3a0799b1780000f79db0b90b8124c043811d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6B 5020 bytes
font_02_sfnt_off00006e7d.bin
7851e9cbabccd8bac84d0efd7362038a21e4c3e012263c6357ddd9d97cef04ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 10432 bytes