Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bf7ee6957507e1…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 17:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63f86122618f3b72088a897bbdf87b93 SHA-1: 7d2034d6987644964c7074f852d9a35b024635bb SHA-256: e5bf7ee6957507e12ed0a252f18e189bfb0fac61f4065365c6783d8d33935fb9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a seemingly benign filename, suggesting a lure to trick users into clicking the malicious link. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a social engineering attempt to drive traffic to malicious infrastructure.

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.cc/wix?keyword=ti+nspire+standard+deviation
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/soho_international_film_festival.pdf
    • https://cdn.shopify.com/s/files/1/0438/7006/0704/files/programma_centrodestra_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/49068412319.pdf
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/kigajed.pdf
    • https://cdn.shopify.com/s/files/1/0430/5754/5365/files/gogusiwur.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9494/files/clicker_heroes_transcendence.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7377/files/wintv_v8._5_activation_code.pdf
    • https://static.usrfiles.com/ugd/b8c837_24bc800fa5614d73aaeccb19781f70d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1fb51ce81404a3294fb1828f2d667ca.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/36767499301.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/rhinosinusitis_guidelines_european.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_off00005387.bin
3d419dc280347f9280213b28883a9521d15a2063ce221fdf6b16881a0ac250fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5387 4932 bytes
font_01_sfnt_off00006454.bin
6d50a65caa3a5f8e0cf951e97366b8b37eadd8e22d7ee651daf3d9964aca0d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6454 10084 bytes

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