Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4d15d10c4f04d9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 00:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 868b6cd41fb0f02fb202dd87ae4699fd SHA-1: a7fb43fab2b1d30505b4983342bfa627e0f7f9e7 SHA-256: aa4d15d10c4f04d94600bb49e59a3d4d6945f6763f7a3f5bc556c3b2e3e4e325
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic specifically identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests a phishing or redirection attack aimed at leading the user to malicious 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=amenorrhea+adalah+pdf
    • http://files.masjidfreehaven.org/uploads/1/3/0/7/130739971/1161561.pdf
    • http://files.thesecretbrowclub.com/uploads/1/3/1/0/131071114/da838a.pdf
    • http://files.herbyagnew.com/uploads/1/3/1/3/131380305/aad93126db9d351.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/zapetonexefakipafirasub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/2177309800.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/python_snack_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/88528168909.pdf
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/riminugipi.pdf
    • https://cdn.shopify.com/s/files/1/0450/2405/1358/files/point_and_click_mystery_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nijudesiko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/21624192882.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/33491036550.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/dabevawefarikikumifaloz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/80560379061.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/gumodiderusodebiwowi.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_off000063ea.bin
793935cc5906f5ce1ad30d815933fbe77c80a3be88da2ed0eb014485f5175963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 5092 bytes
font_01_sfnt_off0000750e.bin
50982d60ab6a86281928d538de2eb0ef3dae551269d018ec906b9e43f4979864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750E 10360 bytes

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