Malicious PDF — malware analysis report

Static analysis result for SHA-256 78288bba324edfd5…

MALICIOUS

PDF

42.3 KB Created: 2020-08-08 22:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f17001a82408b9e7ac507893e4556b SHA-1: 066c7a547764cb70514e3190a1eb9da1ce013fd5 SHA-256: 78288bba324edfd52755ffadfe67c4c04136cbb8313220dd2ffcb0dd78cea419
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at `ttraff.cc`. The document body, though heavily obfuscated, appears to contain text related to accreditation standards, likely as a lure. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=2020+hospital+accreditation+standards+pdf
    • http://files.lauracurtisstudios.com/uploads/1/3/1/4/131453917/8373191bb1c025e.pdf
    • http://files.godfromatoz.com/uploads/1/3/0/8/130874691/vijodotije-mavovolovavitas-xoboruvipem-piporarulevoli.pdf
    • http://files.therecruitmentteam.co/uploads/1/3/0/7/130738799/3844791.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/bopugepewetopimawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/vuvedamefujerizapidemi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/rusebage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/77067954675.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/65699346990.pdf
    • https://cdn.shopify.com/s/files/1/0448/0250/6909/files/infosys_aptitude_test_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tesip.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/blender_2._79_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/18827081432.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_off0000673f.bin
ff5f71d5d690c61b9ddf2c8fedef0be9b8e28861b59ae10a1ed6e50d1bb47b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 5424 bytes
font_01_sfnt_off000079a7.bin
c194c35a559f6bd7e023d5c9ade4387fdc244ba416915fbbbdb30eb4b5617046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A7 10212 bytes

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