Malicious PDF — malware analysis report

Static analysis result for SHA-256 4787f20f9cebe4d1…

MALICIOUS

PDF

52.7 KB Created: 2020-08-21 14:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41544893f44fc7484442e7d7aa080180 SHA-1: 6763d17ce5e062cfa9ff6b74134311b960ba847b SHA-256: 4787f20f9cebe4d14ff9eddc8df44ef5727a49ba2853df5713b16c19f0265ee0
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=einstein+on+the+beach+performances+2019'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which host PDF files. The document body, though heavily obfuscated, also contains the malicious redirector URL. These factors suggest the document's primary purpose is to redirect users to malicious infrastructure.

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=einstein+on+the+beach+performances+2019
    • http://files.christianterrace.com/uploads/1/3/1/8/131857544/detawenunu.pdf
    • http://files.elbowlakebc.com/uploads/1/3/1/3/131398360/rodimasinet-pedetut-luwopeseke.pdf
    • http://files.graciebarrabath.com/uploads/1/3/2/6/132695546/8674285.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/download_english_standard_version_bible.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/accipiter_striatus.pdf
    • https://cdn.shopify.com/s/files/1/0461/9996/3797/files/widugup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3837/4050/files/87265903378.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/47719438408.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/56737957259.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/entrepreneurship_theory_and_practice_raj_shankar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/30014091339.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/1844149119.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/xarizaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/annotating_surface_pro.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_off00008fb6.bin
78af8eefac34ac6d231a92d4cb157cc56792c4702af23592b295d54e5c73e0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB6 5800 bytes
font_01_sfnt_off0000a345.bin
c8f861aa360dda3144ca205356be0108275bd4950107601b0855577d6ca23847		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA345 9980 bytes

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