Malicious PDF — malware analysis report

Static analysis result for SHA-256 30312cc6a47ec232…

MALICIOUS

PDF

46.2 KB Created: 2020-07-20 09:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a3c86a7fd43d81774fbe21515051cb7 SHA-1: ef8c8d3f2db1492f4bf5df02ef2512e6ca97e3cf SHA-256: 30312cc6a47ec232f5853c334e35ea683c82e95b7b4a29d7bacefcf4b1518f49
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'book pdf', reinforcing the lure. No scripts were extracted from this sample.

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.ru/pify?keyword=housekeeping+marilynne+robinson+book+pdf
    • http://files.goldenruleservices.org/uploads/1/3/1/1/131164394/lakobefobutanik.pdf
    • http://files.clarencecoastdbclub.com.au/uploads/1/3/1/3/131383398/91f63ac9ad2f.pdf
    • http://files.stpeterslittlebray.com/uploads/1/3/1/8/131856109/zabopeka.pdf
    • https://gazokuxosatu.files.wordpress.com/2020/07/wobijitikufagiwero.pdf
    • https://zomesepawewo.files.wordpress.com/2020/06/dopawidog.pdf
    • https://mokozub.files.wordpress.com/2020/07/83512523251.pdf
    • https://zukozadugon.files.wordpress.com/2020/07/9563324989.pdf
    • https://kabowaxebedo.files.wordpress.com/2020/06/41724764970.pdf
    • https://xiletemud.files.wordpress.com/2020/06/53763959603.pdf
    • https://sujaxogudat.files.wordpress.com/2020/06/61115542921.pdf
    • https://nazunuwu.files.wordpress.com/2020/07/42260340008.pdf
    • https://selijowo.files.wordpress.com/2020/06/53025050875.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/banedajev.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/vujelalifuzaxexovixag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/sivavafiwenadipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/73090648929.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5979/files/dubetalubusu.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_off000076b0.bin
d7536d0cf28019684f38a828cfb16317246e0a8a68cb3694a267b4484a7d3a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B0 5432 bytes
font_01_sfnt_off00008905.bin
54e6e5ccbc71d08f27b7f3acb0cf58d391f1e0830ad0542509c5b3d30fff0f36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 10112 bytes

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