Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eb85f6398ff808…

MALICIOUS

PDF

51.7 KB Created: 2020-08-09 21:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b40075073fc532345fc75bd051c987 SHA-1: f5a0f0fce3344df9ab4906e79ee9ff1d72897aea SHA-256: 89eb85f6398ff808baa7cf58c481fb9ea64d1fd1ad7167bcd09b5b0a10ec9294
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=free+accounting+dictionary+pdf'. This URL is presented within the document body, disguised as a link to a free accounting dictionary. The presence of a large number of external PDF links, many of which are generated with SEO-like slugs, further indicates a link farm or redirection tactic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=free+accounting+dictionary+pdf
    • http://files.scubatom.com/uploads/1/3/0/7/130739616/binuled.pdf
    • http://files.holisticcoachsg.com/uploads/1/3/1/4/131407705/7bde5.pdf
    • http://files.minortrends.com/uploads/1/3/0/8/130874588/4561014.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/wazopiwogafimiludukawezug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/83093078808.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/enterprise_risk_management_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/mosemugimekapawofab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/94001492733.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/71875936499.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/building_construction_cost_data.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/lifujuvimotinusawumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/jifox.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_off00006158.bin
91209bce0d860463d74ef41f0bb7fc918513ae34e2a623520f745e996a4afb35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 5172 bytes
font_01_sfnt_off00007304.bin
57bdf06c6292086add387f10af9ff14031d1c3837ba6a63e04b14693dbaf2433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7304 2396 bytes
font_02_sfnt_off00007dce.bin
932ad577ccb02110b0b5321bf29724db231cdb54a6cd1ad153747d38c40f2b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCE 15736 bytes
font_03_sfnt_off0000a98c.bin
9c212e23ffe3612f05601ad2c334503c287548533cabf75a59ffca75ccbdc065		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA98C 17056 bytes

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