Malicious PDF — malware analysis report

Static analysis result for SHA-256 858a2817436aef5e…

MALICIOUS

PDF

53.0 KB Created: 2020-08-29 06:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5231d7b88542d446e6657831abbc7068 SHA-1: 0d62d83c8817a6a99b943d9d0c15b8d83be06a2f SHA-256: 858a2817436aef5edb2831567d0a74fe45ac567ad6a2fdb7b45fc4a3b4c493e6
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains the same URL, presented as a download for an 'english patch'. This suggests a social engineering lure to redirect the user to a malicious site. The PDF also contains a link farm heuristic, indicating a broader effort to distribute 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=real+play+illusion+english+patch
    • https://static.usrfiles.com/ugd/b8c837_75bee5003aae441fa7180ee3df48be7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8149432e2c5c46d0aaa8f2b731c2bcc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f24e032cf0b649c29392139d860a3a2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_757eb45f7b604307b38eaf564db98e1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd3659b497844cf6a7dd355e08143771.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/atos_institucionais_ditadura.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/gexaniviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/si_joint_dysfunction.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/retaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7624/files/zesipukutubajemarus.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_off000074e5.bin
84c6843604d6bd7252a12cc88016304e459b65f1319e2e204fb9cba919684209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 8588 bytes
font_01_sfnt_off000091f1.bin
51b92596152d2234da846f9d98f8c787ceea92b4c2e94c0558e5df48a3384fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 5208 bytes
font_02_sfnt_off0000a3b4.bin
3bcab20349609a550a7fda5e4c3951c0798582e6ae42c670ae91a57e1c06b852		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B4 10360 bytes

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