Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00f500f7b5b4950…

MALICIOUS

PDF

36.8 KB Created: 2020-09-12 11:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b6e464a31b8bd006b8e6fc743e9d06 SHA-1: 6b430f7b5442630f2575989d81894a1a156fa32d SHA-256: b00f500f7b5b495007d628414afe77cad3f17964de471e3159c19d4f31cdbdf4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.me/pify?keyword=conhost.+exe+windows+7'. This suggests the document is designed to lead users to malicious content through a chain of redirects. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the link farm.

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.me/pify?keyword=conhost.+exe+windows+7
    • http://dawigo.justinedaisuke.com/uploads/1/3/2/6/132695780/2b81ae5d.pdf
    • http://wobufal.amommachoosingjoy.com/uploads/1/3/1/4/131406071/narag_mijixug_jifabiwaza.pdf
    • http://files.moderntactical.org/uploads/1/3/1/0/131070849/mapajapabodizaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5013/0846/files/90310827534.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/antispasmodic_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/kejigiwikoterixe.pdf
    • https://static.usrfiles.com/ugd/11f207_c7afc23426ad463192c51817daa9b6f3.pdf
    • https://static.usrfiles.com/ugd/4ae4db_eb4d0777c0914e2e989872d14e177ca0.pdf
    • https://static.usrfiles.com/ugd/7921d2_58a8d1e1b860497599aa689cac10f806.pdf
    • https://static.usrfiles.com/ugd/011e4b_662e43f015f243518eb1c2542da59dfb.pdf
    • https://static.usrfiles.com/ugd/31593d_6f107d79f0854e68a56c25cf813d6129.pdf
    • https://static.usrfiles.com/ugd/bae363_172675aff16f4c4385790b35cc28e926.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_off00005385.bin
802040fe835794d92910c41a939ee5b318d26194f8e15b6c52208d4dadf6f024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5385 4752 bytes
font_01_sfnt_off000063d1.bin
09847d6eaacec00ce60cab4756ca64753acf887ecf5cd4ba15b9967cf54795aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 10160 bytes

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