Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d2d7efb3b14909…

MALICIOUS

PDF

49.5 KB Created: 2020-08-31 10:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d94b989a5401d53f78d88aca883fe94 SHA-1: 5fc6eabec55f330847b9d07e71199c484f5d6036 SHA-256: 33d2d7efb3b14909ab69ecc52520e735b5b59cb217b9ee7245b1a431797ae78f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=artisan+workshop+guide'. The document body, though heavily obfuscated, contains text referencing this URL and other benign Shopify links, suggesting a lure to a malicious site disguised as a guide. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=artisan+workshop+guide
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/54785900446.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/vibumupilotisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5252/files/84747737136.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/appropriation_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/4095/5803/files/sawara.pdf
    • https://static.usrfiles.com/ugd/44b221_9ede7639cce744a581b6d57d1e1f2298.pdf
    • https://static.usrfiles.com/ugd/99afdc_f68c442c9b0d44b1b69b05a5983f2de2.pdf
    • https://static.usrfiles.com/ugd/b8c837_07761a20b169468d989b6dfce4f0a24c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c266b54b4b447ba8891eae0752843d8.pdf
    • https://static.usrfiles.com/ugd/f46427_7dfe5bb4b9d94657b05ff0a233c0e04f.pdf
    • https://static.usrfiles.com/ugd/3cb679_0224603d62f9474a9406401296468fbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4a94a6ddf6d452cbc41c039b8f8e669.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_049ddf12fb954e33be810bd61a50633f.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/st3_form_mn.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/xajowuweb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/jolemutixavubogivufi.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_off00008407.bin
25d4ec33fc354e3940deeeece999e2570720dc39c785429fb15979ac527ca7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 5332 bytes
font_01_sfnt_off00009635.bin
ca67e14d65fc99ff6cba2678e8985cfc2361436cacfd4001df98888ddb94ed86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9635 10376 bytes

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