Malicious PDF — malware analysis report

Static analysis result for SHA-256 4644fb55a795dc40…

MALICIOUS

PDF

124.4 KB Created: 2020-08-11 06:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69d25695f6aff5267db0b821eb19fbff SHA-1: ee86b0b33d3faa6504777888e9e820b070cd3706 SHA-256: 4644fb55a795dc408d11c4a4b68c2c5d37e1bef5e88ea343c8e37cc574bf7b60
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 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to a malicious site. The PDF also contains a large number of external links, indicating a potential link farm or SEO poisoning attempt to drive traffic 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.com/pify?keyword=alchymista+pdf+ke+sta%25C5%25BEen%25C3%25AD+zdarma
    • http://files.designsbybrunner.com/uploads/1/3/1/3/131398504/7e4eedec7.pdf
    • http://pevusub.savejonesstateforest.com/uploads/1/3/1/3/131379706/gagoremosutiturogiv.pdf
    • http://files.contigodevelopment.com/uploads/1/3/2/3/132303219/resowewaxaronivipid.pdf
    • http://files.weatherstrider.com/uploads/1/3/2/6/132695472/3631250.pdf
    • http://files.sdinspectionsllc.com/uploads/1/3/1/8/131856877/tidiguxufulezomarop.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/gugekoguforevuxigefotifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7075/files/zunonigeroke.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/objective_agronomy.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/xopaxiji.pdf
    • https://cdn.shopify.com/s/files/1/0447/2363/4330/files/general_chemistry_exam_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/21201523935.pdf
    • https://cdn.shopify.com/s/files/1/0434/2824/9767/files/electrical_engineering_nptel_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/miloganukixeroxataneg.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/54957278580.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/30425941185.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_off0001a83b.bin
ebf42a7f02d795931d7e4740661f1cf215f959ebe137c8d1376e1cffc23a8e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A83B 5732 bytes
font_01_sfnt_off0001bb94.bin
0fbb0ddb48de00f3f8eeea27ae35c62bba440d5fee8f3f65559f5ce708513541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB94 13072 bytes

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