Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b203bffadbe3e1b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-08 11:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1deb6bdae8cd16ba80da443c4c5800 SHA-1: ceb31f5045a2c7c559f0d61b54fb3e6da3d5a126 SHA-256: 8b203bffadbe3e1b7092257d914926be7c687fc6e96f663c0ccf746d747a8f46
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link identified is https://ttraff.com/wb?keyword=spacecraft%20system%20engineering%20pdf, which likely leads to further malicious content or downloads.

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.com/wb?keyword=spacecraft%20system%20engineering%20pdf
    • http://files.howtobeastrongwoman.com/uploads/1/3/1/3/131380598/jilulenogudej.pdf
    • http://files.ambiguouslyaj.net/uploads/1/3/2/6/132695280/peweliwesi-robod.pdf
    • http://kubej.steinlecounselingservices.com/uploads/1/3/1/4/131407227/8543882.pdf
    • http://files.carmenpuscas.com/uploads/1/3/1/4/131406841/dbc6cd03d5e80e7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/49067866947.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/angle_relationships_with_parallel_lines.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/sigmoid_function_numpy.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/ponimiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/5390788927.pdf
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/eccentric_training.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/55472781540.pdf
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/91909315646.pdf
    • https://cdn.shopify.com/s/files/1/0434/4997/4946/files/hollywood_movie_in_hindi_avi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/human_activities_that_affect_the_environment.pdf
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/minifojuposemagutarawu.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_off00006945.bin
3c389047af0b76326f4ddb85a6a8d524eba5c6260e86ea685bd5710c911991d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6945 5648 bytes
font_01_sfnt_off00007c77.bin
760e964f4836158634f5cdd7e8a92e40cfeb7b423d1c1de3d4b640048a98358d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C77 9796 bytes

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