Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6719ede79b1016…

MALICIOUS

PDF

46.2 KB Created: 2020-08-27 16:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ca1d5c8b7fcac6d2b387ead602fb5f SHA-1: 2bc28647ebe3ad7d03440f2d40c4a7c263e991cf SHA-256: 4b6719ede79b10167eeef4958a2bd45efe726c909bcf848a39ee4abeb6076ff4
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, directing users to 'https://ttraff.ru/pify?keyword=error+on+message+terraria.messagebuf'. The document body, though heavily obfuscated, appears to contain this same URL and other benign-looking PDF links, suggesting a lure to a malicious site. The presence of a link farm heuristic further supports the malicious intent of distributing links to potentially harmful content.

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.ru/pify?keyword=error+on+message+terraria.messagebuf
    • http://jozutosaj.fireadysg.com/uploads/1/3/2/8/132814930/dogutiwonuxojuzukode.pdf
    • http://bowuxiv.comforthomeinspections.net/uploads/1/3/1/4/131405927/58577.pdf
    • http://files.rockymtnblueticks.com/uploads/1/3/0/9/130969313/pamugup-wonafiga.pdf
    • http://bubado.jimmylenman.com/uploads/1/3/0/7/130738950/fcdcdd.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/antimicrobial_activity_of_plants.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/the_poetics_of_reverie.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7760/files/56479388190.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/lozaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/momafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/kopowokotefijijigavelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/bobowajeda.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/vimogoz.pdf
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/thinking_in_java_4th_edition.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_off00006e47.bin
15fe1ffa3b99169f1ea0dc8468ec2c13fd0e5f8efa2e8fc31fad7a2dc2301cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 5184 bytes
font_01_sfnt_off00007fdc.bin
9fb741c98d39544060985c16a6c014cbbf31f3f48cd344f19e573beaf572bfd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDC 14144 bytes

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