Malicious PDF — malware analysis report

Static analysis result for SHA-256 e475252126334756…

MALICIOUS

PDF

41.9 KB Created: 2020-09-15 07:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026b8cd9fb940a744e9a984d3d08f233 SHA-1: 36147278f525d1f5b42209037eadd9923ce28e01 SHA-256: e4752521263347562295fda549908e89bd28de540ea0d04fc31e855a486c700b
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments that appear to be lures for free games, aligning with the malicious redirector's keyword. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the embedded links and the document's structure as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/pify?keyword=last+stand+union+city+hacked+free+games
    • http://puwipo.smilliestudio.com/uploads/1/3/0/8/130814328/sepafozulono-kadogawe-pefogozasigaroz.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • https://static.usrfiles.com/ugd/2b25b5_d375a9115d6e4f1699319914c71bb828.pdf
    • https://static.usrfiles.com/ugd/b8c837_71eaf389f3d94dfd8354dcb8484d49b1.pdf
    • https://static.usrfiles.com/ugd/1c90dc_8a1e2d8535f6475a96404790faa315b4.pdf
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/subiwibudepezijuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/55759214007.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/56355286935.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/reformas_borbonicas_sociales_de_la_nueva_espaa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/vapekimulazopirexoji.pdf
    • https://static.usrfiles.com/ugd/a32c20_ea18a00688fd4f2d9723359fcec0a915.pdf
    • https://static.usrfiles.com/ugd/96768c_9b02f341666d47cc8b8d06027386fa3c.pdf
    • https://static.usrfiles.com/ugd/cbe325_6026b123fb1c4adab6ff252d1d525e10.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_off0000506a.bin
26b2477607289d2a22d9a7e59eaaa182ee3075b68cb6eb7e2f88cbdadf9af6b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x506A 5508 bytes
font_01_sfnt_off00006310.bin
799ea5ac56579db73af7279d06fcaa3ecbabec387b64ef61b1cad9e76d17e63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 10128 bytes
font_02_sfnt_off000085be.bin
77d0e41b193f2956426f125f137c5665e22c2099967b8d3a504bff5b234847bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 16076 bytes

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