Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbbb052c53c7f7e…

MALICIOUS

PDF

55.4 KB Created: 2020-07-31 13:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fee4f80c021145f13a07e8710eb757f SHA-1: a048cd6e4bf9c5a50b425a427781a7f14a86dcd6 SHA-256: dbbbb052c53c7f7eef2d21e1f1f7d95945cc0fbcd7932d1c07b2c1594ce193cd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to trick users into downloading a PDF. The document body, though heavily obfuscated, appears to be a lure for a technical book. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=mastering+bitcoin+programming+the+open+blockchain+free+pdf
    • http://files.ccceinc.org/uploads/1/3/1/6/131606630/ruwifadedosojexuxo.pdf
    • http://files.personalsafetyandpistoltraining.com/uploads/1/3/0/7/130775848/sofogemixunakutose.pdf
    • http://files.vullowisp.com/uploads/1/3/1/1/131163774/rubabefozet.pdf
    • http://files.ccceinc.org/uploads/1/3/1/6/131606630/ruwifadedosojexuxo.p
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/6745579440.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/59010096467.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/6773960285.pdf
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/4328595171.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/39857379197.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/19107485974.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/49322804761.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/34687902072.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/50427859732.pdf
    • https://cdn.shopify.com/s/files/1/0432/8908/4068/files/31304420724.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/xiwobenedagavifex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/29438346079.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000759e.bin
d5e71e3bb38b891b2b4a63263f57d79c3376d0b63c30169ace06215c59a8d9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 5564 bytes
font_01_sfnt_off00008849.bin
159711d1b98c995f20f188c1d37d784dbbfd483212a405608feacdcb51223f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8849 1768 bytes
font_02_sfnt_off00009114.bin
44381cda48259dbe0c2ed28f0d19e0f07d8c94beb70f99fbf310e7be80c4bf3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9114 11460 bytes
font_03_sfnt_off0000b797.bin
c1577f57d62e94470c48c16612362e25bf4924e4ed94cc620fab4f6334b7daa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB797 16788 bytes

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