Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05e80c45f1318f8…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 14:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d035ca706a5b9fca60748c250af569d SHA-1: 3fbbc7149748b60ac141e399c13e15963ed27065 SHA-256: b05e80c45f1318f82c6a503f92e55022177f387645985b8efdc725c1681d22a4
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to potentially malicious or unknown domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=piano+music+theory+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to this malicious site, likely for further exploitation or phishing.

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=piano+music+theory+pdf
    • http://files.815lashed.com/uploads/1/3/1/3/131379567/tazilij-ripesowid-junigivap.pdf
    • http://files.debistrong4peacehopelove.com/uploads/1/3/0/9/130968921/01f7e300c72.pdf
    • http://files.cycleecosse.com/uploads/1/3/1/4/131406650/sofegapanokojo-nixegifizoreji.pdf
    • http://files.elkfordchamber.ca/uploads/1/3/1/3/131398424/f1688.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/felimove.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/26474072798.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/esl_possessive_adjectives_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0441/2106/3576/files/601713251.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/doxikabogupinekinibuzovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/betuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/24314915778.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/tf2_interp_settings.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/excel_2020_advanced_filter_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b0.bin
27d84a0ed75b5a05acbc833a436c243f402339153c96b5ff5550c50626add71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B0 5468 bytes
font_01_sfnt_off00007329.bin
3881c95b0a6353c7e01d439f6af24d9af6e865fae3f6f640462e776e76aaa42c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7329 10076 bytes
font_02_sfnt_off000095a4.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A4 16120 bytes

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