Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af7ca1d4ca793d1…

MALICIOUS

PDF

49.0 KB Created: 2020-09-07 06:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd089c1c61e5a8130588305cfdeab3ff SHA-1: 7f57c36612966d9431184468aaacfabc34e25419 SHA-256: 2af7ca1d4ca793d1e51f80002c2bde6240fac9cbca5cb2d18858e8b1b524b85e
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=chrome++server+certificate'. The document body, though heavily obfuscated, also contains this URL and a large number of other PDF links, indicating a link farm. The presence of a "download button" heuristic further suggests a social engineering lure to trick the user into clicking the malicious link.

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.link/wix?keyword=chrome++server+certificate
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/mexeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/61275265289.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/past_simple_and_continuous_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/aeroponics_potato.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5765/files/gekezesolekitod.pdf
    • https://static.usrfiles.com/ugd/f241d9_bc6d2604a818454ebdc1e68bb9617674.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/greenhouse_gases_and_their_sources.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/rerejisumajipifexebin.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/ctet_july_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/dikugazik.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_off000077f9.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 2828 bytes
font_01_sfnt_off000081f4.bin
29ce84c286ce7f98fd55b44de5dd011d8664687d04bb1f9fa3350f37acc11bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 5052 bytes
font_02_sfnt_off000092fc.bin
698a0721c98d7c4f60de828bef8313e5b085e129296e5aaeb3444a02d4d2d79e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92FC 10096 bytes

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