Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be97af790176b35…

MALICIOUS

PDF

53.2 KB Created: 2020-07-31 12:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ae667df52a2d74301794d9be7e2967 SHA-1: 365363c81392912c61ac3830a3b71eacc78b4c6b SHA-256: 2be97af790176b353b1e73f925a8d0532678c85c93d421d0642ed1642a8cae97
128 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is a business English vocabulary exercise, but it embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and PDF_SEO_LINK_FARM indicates a large number of outbound links, many hosted on Shopify. The SE_INVOICE_LURE heuristic further supports the deceptive nature of the document. The primary IOC is the malicious redirector URL.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=business+english+vocabulary+exercises+pdf
    • http://files.nordportal.net/uploads/1/3/2/6/132695451/pibufa-nuwoziwaparama-ranasuzapason.pdf
    • http://files.donaldtrumpacunt.com/uploads/1/3/1/0/131070859/7520e1f8.pdf
    • http://files.courtneymlandis.com/uploads/1/3/0/7/130739312/bfc02e5d.pdf
    • http://files.yvonneburton.net/uploads/1/3/1/3/131384113/5932996.pdf
    • http://files.kaysewienekephotography.com/uploads/1/3/1/6/131636914/bolopamip_pupazaboxenipu_nojupakexax.pdf
    • http://files.kaysewienekephotography
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/xabavatatudubuvisavasud.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/kubulubekegiminol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/2267531588.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/savune.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/88309931402.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/98439261227.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/sipukadoxijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/pefanovorovifoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8604/3541/files/lunitefexifiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/35793768347.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/zepunom.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007172.bin
8af650ae4c5d76582d8ad3ddb9d2d306971c4657128fa4bece0ce14a67be793e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 5640 bytes
font_01_sfnt_off00008489.bin
145221cabc2cd2ccba74deb3953ae5503754f1434333b9a87b88d9d5dd338e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8489 1832 bytes
font_02_sfnt_off00008d64.bin
e6df06caea831ecad6b364c258cb3b895eae98a77d4a0f75d6281a68037e55b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D64 10156 bytes
font_03_sfnt_off0000b051.bin
76c58d9dad2553210f58dd276edfbe5dbdf64153339314c97a5850829df6aff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB051 16508 bytes

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