Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af9a3003c9f572f…

MALICIOUS

PDF

52.5 KB Created: 2020-08-29 10:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff693f7821d54e25fcb7b31445ef5034 SHA-1: ea7935d10bbacad591eb7ac858494f772b03609b SHA-256: 4af9a3003c9f572f6a8e224109adf04e8e53a0b78ca5335b6d8ba3ec15d2d2ee
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=the+murders+in+the+rue+morgue'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a reference to a Shopify PDF, suggesting a lure to a malicious site disguised as a document. No scripts were extracted, limiting the analysis of further payload delivery or execution.

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/wix?keyword=the+murders+in+the+rue+morgue
    • https://cdn.shopify.com/s/files/1/0432/3855/5805/files/55369208758.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/xigotebamale.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/32643277939.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/mitre_binding_of_isaac.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/biochemistry_for_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/tobedewimoxazomexegaxire.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/68754454525.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/b._el._ed_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/ramivubururutenusefanuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/western_union_online_transfer.pdf
    • https://static.usrfiles.com/ugd/b8c837_23b63cce26374534be4d53628a15a292.pdf
    • https://static.usrfiles.com/ugd/b8c837_b66af327c13643228fe2a10cfe26f05c.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f6d476237140a09f7b6bb1f7149c77.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_off000090d9.bin
482778387347c63b73d003435e0d2c115d2091fe79b4e083056d1bb8a3b9a295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D9 4948 bytes
font_01_sfnt_off0000a184.bin
31f0902c4d4cbe91c1b8f91532c9107082cb18bdc909ccfeb2f3547c69e0fbf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA184 10336 bytes

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