Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39f7924b5223a81…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 09:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a638a1b5e20f8660a4390f7b8108111b SHA-1: 30eccf966973031d246b057216b7c0bb3468c1f1 SHA-256: c39f7924b5223a8182f86ec68633db19db2c16d981848ff473181b7a0bbc5cc1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references a recipe book, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, including one hosted on 'othpreparedmeals.com' which is also flagged as unknown. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.com/wb?keyword=eat%20well%20for%20less%20recipe%20book%20pdf
    • http://xupadis.othpreparedmeals.com/uploads/1/3/1/4/131454012/zipikizuxug-tulofabeg-diwedewexodiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/givowegawububu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/9931629457.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/91579487591.pdf
    • https://cdn.shopify.com/s/files/1/0445/1434/5119/files/date_create_from_format_datetime_php.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/mekutivimagidupam.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/1123536480.pdf
    • https://cdn.shopify.com/s/files/1/0450/8899/7541/files/canon_lide_110_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5637/files/icecream_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7727/files/los_6_puntos_del_acuerdo_de_paz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0558/files/retewimod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/85627110573.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_off00005ccd.bin
68dcc0bf87158305c736666a014c4393395603496f602016889f6f2fc115c7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 5400 bytes
font_01_sfnt_off00006f4c.bin
6489f4ec0f5bdf881782f6e5cd550d65dfd0fc26cbfc96396dc7ca9680233442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 10300 bytes

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