Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf77699159fd450b…

MALICIOUS

PDF

46.3 KB Created: 2020-09-03 08:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 590fedb868484832ba7bca9cc420ed9b SHA-1: 5a7f7893d4ec523c055b787b866770aaba4fc331 SHA-256: bf77699159fd450bbff1556540734d39c184eda4c593a5d55c1d2bb9f618ac3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a link farm and a malicious redirector URL, masquerading as a lure to install a browser extension or update. The primary malicious URL, https://ttraff.me/wix?keyword=uc+browser+apk+free++for+pc, is designed to trick users into downloading potentially harmful software. The document body, though heavily obfuscated, contains references to 'uc browser apk free for pc', reinforcing the social engineering pretext.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/wix?keyword=uc+browser+apk+free++for+pc
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79086372433.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/tisajetudusumete.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/aegis_mini_mod_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/medipejudagip.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a46d5b8ab294e7a97e3382c3e3bb177.pdf
    • https://static.usrfiles.com/ugd/52b593_55ba22fbab654b5b8480f1ff9ac52905.pdf
    • https://static.usrfiles.com/ugd/b444d4_c10f7fb4ef4347dbb11f50f9a4b47049.pdf
    • https://static.usrfiles.com/ugd/12dc78_33dfa117940948ecb58dd057cbb3303e.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_093a90bcda3a4b21a76f0489c13bc532.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/ejercicios_de_distribucion_normal_aplicada_a_la_psicologia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/98328184351.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/dimezinurujul.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/buku_tentang_pluralisme.pdf
    • https://cdn.shopify.com/s/files/1/0440/3009/9606/files/dejiwozifaz.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_off0000623a.bin
0a1d268e928e084fceb1e8151391071a4bf5b864e8d1e1c3ade4c5490ed5eada
pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 5264 bytes
font_01_sfnt_off00007446.bin
3c3751716ea4d91e8f908250306d7c0da786b8e8510c6e586224345f644b4247
pdf-font-stream PDF embedded font (sfnt) at offset 0x7446 10188 bytes
font_02_sfnt_off0000977d.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
pdf-font-stream PDF embedded font (sfnt) at offset 0x977D 16092 bytes