Malicious PDF — malware analysis report

Static analysis result for SHA-256 222ede7320715284…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 19:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049916aeea069116cc76309f1312fc20 SHA-1: bfc392584d49b6a57481d8ec05334d430d95b41b SHA-256: 222ede73207152845b86c9747ce6caf08ac19ad6d2b322d0c1d4c6afb8d41d4e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/wix?keyword=accounting+information+system+meaning, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'accounting information system meaning' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous links, including those hosted on Shopify, indicates an attempt to create a link farm for SEO poisoning or to distribute 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.ru/wix?keyword=accounting+information+system+meaning
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/48967493302.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/60169234704.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/53125499324.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/kalodozaxoxolobapino.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/wogapeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/30485698990.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/chaa_study_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/high-_power_gaas_fet_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/73670146367.pdf
    • https://static.usrfiles.com/ugd/269bb8_8daf03d1cf53460f9c3ce29e57a83491.pdf
    • https://static.usrfiles.com/ugd/30e015_f98dad2351b54335b041ee3f74b910f9.pdf
    • https://static.usrfiles.com/ugd/74c34a_21e8a0e5e1a547ae9822ce419ae064ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_7939f6dd75bb4f98a9d5adffb1a465b1.pdf
    • https://static.usrfiles.com/ugd/ec0c41_8e33d893ecdc4d45a6c5b84e51a73d19.pdf
    • https://static.usrfiles.com/ugd/01e791_fb81163ba58a4066a240ffaa2613dc7a.pdf
    • https://static.usrfiles.com/ugd/4d6844_e10861b0520848e8ae8447cb18081a35.pdf
    • https://static.usrfiles.com/ugd/4f270c_8518483f6026465a94d317c24564a71c.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_off00005d0f.bin
70d5146f795eeca041e4967f519d1d0fb0495400c3b1380b3e546dc5dac6311e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0F 5260 bytes
font_01_sfnt_off00006ee6.bin
98b37902a698fe0020435798504606b8149f5a8777440e2d50bf2ceeb11fe710
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 9548 bytes