Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0cc1bcb0534f55…

MALICIOUS

PDF

58.5 KB Created: 2020-08-23 00:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe60edb548b1a5e229fff59ef2bfa45 SHA-1: 8242ead6525d36622da8e8b7abcdc9230dcaf5e3 SHA-256: 4b0cc1bcb0534f558b95504fc7f63cc3794b6fc1c80c3ce6d99a358e7a04b67d
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=naca+airfoil+coordinates. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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.com/pify?keyword=naca+airfoil+coordinates
    • http://files.expsalonandspa.com/uploads/1/3/1/1/131163788/vupaxejojepaxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5348/files/strength_level_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0437/4436/2647/files/61149215441.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/loxovodobokifovel.pdf
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/kozurisifaraxonodokum.pdf
    • https://cdn.shopify.com/s/files/1/0436/1859/9075/files/oblivion_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/chicken_invaders_5_free_game.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/43093930756.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/animasi_ppt_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/toberugopaxabaxiripeguz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/mokutelibeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/36524053306.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_off0000899c.bin
5072c787353e6f0f0236ccc3aac7fd777775e58f4ecf439341329a76b2e94fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899C 4984 bytes
font_01_sfnt_off00009a96.bin
520ea2671aaf6fb81e1fc1572e0117e749c2f25a9f8654e2d3a2e8c78c3c0455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A96 14376 bytes
font_02_sfnt_off0000c8a3.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A3 16036 bytes

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