Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4af706892e96c6…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 14:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2ef6cb5906940f45f8c55885e389ce SHA-1: 285cfb911cc8dba2c3274dd9a107e71f7e589c9c SHA-256: fc4af706892e96c6b69e47138b612109c8063871b762f96dbc914582e1175c75
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for link farms and SEO abuse. One of these links, 'https://ttraff.ru/pify?keyword=structure+of+the+earth+worksheet', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Structure of the earth worksheet', suggesting a lure to disguise the malicious intent. No scripts were extracted, and the primary malicious activity observed is the redirection to a known malicious URL.

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=structure+of+the+earth+worksheet
    • http://files.karensartgallery.com/uploads/1/3/1/4/131437194/ralijo.pdf
    • http://remiziwox.wwecc.com.au/uploads/1/3/0/7/130775320/8030199.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/curvilinear_coordinate_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/carpentry_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/xuxeluruvifixano.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/daxolitoroxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/12361324976.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/98361387656.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/ministry_of_agriculture_annual_report_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/72196156240.pdf
    • https://cdn.shopify.com/s/files/1/0448/5061/0336/files/waxezoxabezawikikekod.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_off00005a56.bin
1cd44916c457d27c94b6bc6e961143eded6cef61d6ee310d40614253746a6602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A56 5196 bytes
font_01_sfnt_off00006c0d.bin
4c9273aaa3700cf3bd866ae5d410a4a91e39e39fc254c0ad20f33cf62a079375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 10132 bytes

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