Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4ec0ab1db1b98f…

MALICIOUS

PDF

38.8 KB Created: 2020-08-09 05:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78922f0db91b9929680d375221654b9b SHA-1: f1516072d5fc0598bffcbcdbeb4b303b244931b7 SHA-256: 7e4ec0ab1db1b98fb2292f041d230d864900e52d7e893a8cfef47b5f9be9bc30
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL disguised as a legitimate software download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK directly identifies the malicious intent of the link to 'https://ttraff.ru/pify?keyword=adobe+pdf+reader+for+windows+10+pro'. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The numerous other links likely serve to obscure the malicious destination and improve search engine ranking for 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=adobe+pdf+reader+for+windows+10+pro
    • http://files.bakeabetterpie.com/uploads/1/3/2/7/132712011/6288096.pdf
    • http://ferewe.rootedteens.org/uploads/1/3/0/8/130814328/1165385.pdf
    • http://bavajoto.kentuckygrapplers.com/uploads/1/3/1/3/131381204/329a9d3cc37f0.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/lafopegowumodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/jolajezekozudorizi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/zuxigijodubumiroked.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/totezaluwowamojalisivojev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/metavezezogadejovigevela.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/33610179934.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/62174321185.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/bopumatibitomegoxidutono.pdf
    • https://cdn.shopify.com/s/files/1/0435/2278/5444/files/sofunofazugi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/55615290768.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/assemble_to_order.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/is_trinidad_james_dead.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_off000059cf.bin
821d4f4fb23e9b1cf268ebcff26180e68af59a1e766ce3c9e8e0183468bebf6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CF 5420 bytes
font_01_sfnt_off00006c58.bin
f0d6eb170979f8d1a0fb50669d1fd0d096e164ca1d4c8482f704c8c3075da297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C58 9984 bytes

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