Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf70db2674a5611a…

MALICIOUS

PDF

45.3 KB Created: 2020-08-03 10:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 579b862cc00135c60ff25ec15363338c SHA-1: 96cb1acc6a3f2d5272ac8b1c2b5c92593cc64c72 SHA-256: cf70db2674a5611a9ba901ad0463f4eb0f4219b33e94dca8d96604e3a4eba9b8
160 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of this redirection chain. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates a social engineering tactic to trick users into installing malicious software or extensions. The primary malicious URL identified is https://ttraff.ru/pify?keyword=index+html+examples, which is likely used to redirect users to further malicious content.

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.ru/pify?keyword=index+html+examples
    • http://files.waggonerinsiders.com/uploads/1/3/1/3/131398129/vomisunigari.pdf
    • http://files.transawareness.org/uploads/1/3/1/4/131453253/5790207.pdf
    • http://mixaruja.ancestralmatters.com/uploads/1/3/2/7/132712109/padiwe-tizarujawizeni-nenuvelido-wofubopirar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/mebirabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/ride_the_lightning_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/2807048998.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/60159328172.pdf
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/velvet_goldmine_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/8170/3319/files/tasizujefewiwosofizipigen.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/10265276878.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/15462248746.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1787/0239/files/setoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/eso_maelstrom_arena_exploit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/45429167168.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/1716849469.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/zelaxipifugavigaximo.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_off00006c21.bin
43128b9c70ab620dce577c1f126ac5432db3f0925c2202f4a2528460b1b456c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C21 5108 bytes
font_01_sfnt_off00007d5b.bin
e96a3a6d4fb6a1fa64c98d0fd3b7fb6d69bf7f6d7d2ffffa3c3432cd04458cda
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5B 13668 bytes