Malicious PDF — malware analysis report

Static analysis result for SHA-256 9233c4f066dc9d54…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 05:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6104c7dc557849b6ac7763ba716a5dd6 SHA-1: cea3027a12e05da88f0028efc1590956378c862c SHA-256: 9233c4f066dc9d546d7ff82fddc7cafab661c23c6acd882455670110a1e387d5
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at ttraff.com. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=msc+applied+physics+syllabus+pdf', suggesting a lure to download further malicious content. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm SEO strategy to distribute malicious files.

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=msc+applied+physics+syllabus+pdf
    • http://files.rockinstreetwear.com/uploads/1/3/0/7/130739274/9533637.pdf
    • http://files.seasidejewellery.com/uploads/1/3/2/7/132712315/7998453.pdf
    • http://files.eytspartans.org/uploads/1/3/2/8/132814996/fusakupafogureb_rosama_somufivijaso.pdf
    • http://xulaxe.townhall2020.us/uploads/1/3/1/6/131637223/1d920f6d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/17447513828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/32245735085.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/5th_edition_character_sheet_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7986/files/pebasotewepoferi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/tevuvokijulide.pdf
    • https://cdn.shopify.com/s/files/1/0447/9080/8727/files/punjabi_alphabet_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/30077957463.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/42401112779.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/80006993167.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/solutions_manual_test_banks.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/zopizo.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_off000066e8.bin
70d577c03a2cc0280fedc3268a4bd9a217fb3e216d9c9f4dfe868f3dc887cc51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 5396 bytes
font_01_sfnt_off0000793f.bin
fe5d2feacc77e2f9b7168101f8e2e4cef08dd34f4dcd92b035657fe1dd3b3446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10248 bytes

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