Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22bb79a319fe7c0…

MALICIOUS

PDF

47.7 KB Created: 2020-08-09 16:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e8cca0efb925ddde27f4ba6647fd75 SHA-1: f585227c83b5a6820ef79ccfe2cb19d599ae8b0a SHA-256: b22bb79a319fe7c069258d3197858a50a2f8ae35bb509eb1ae0195ac1bcb7542
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cumulative+frequency+histogram+pdf, which is likely used to redirect the user to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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.cc/pify?keyword=cumulative+frequency+histogram+pdf
    • http://gisabexo.maysangels.com/uploads/1/3/1/4/131483254/rulux-lukuxewuzejabi-sanufunawamed.pdf
    • http://files.oregonplumbingandpump.com/uploads/1/3/1/8/131859370/vuzepuvegamopabos.pdf
    • http://files.jimgarvin.org/uploads/1/3/0/7/130739570/gomip-tasawukebu-jiridaj.pdf
    • http://files.jameswilmot.com/uploads/1/3/1/4/131406498/701dd.pdf
    • http://files.trilliumwildedibles.com/uploads/1/3/0/9/130968988/1a638bb9622.pdf
    • https://cdn.shopify.com/s/files/1/0448/0991/2477/files/38._6531004_90._243462.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/killer_instinct_mame_rom.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/99148254406.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/9687573684.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/captivating_journal.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/xakujekorurasizolakukemaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/fema_nims_100.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/kujitoguwasaxutoruganumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/dofuzixu.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_off00006c47.bin
37abf6fff181ccb49125dc74ce336c080ac35b59125ff76d5db0a14b13d130b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 5760 bytes
font_01_sfnt_off00007fb7.bin
1308ca41dc2c12d55c37a0d6b68df710af8c70c9e6d71112e9ad8db82fecdf80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 10508 bytes
font_02_sfnt_off0000a371.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA371 4324 bytes

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