Malicious PDF — malware analysis report

Static analysis result for SHA-256 936827ba7ceb0e5c…

MALICIOUS

PDF

47.1 KB Created: 2020-08-24 02:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb952dd59725da0ff612967747032e3 SHA-1: ee4ac8b25ed60982d06ae7aab4248d1425dde647 SHA-256: 936827ba7ceb0e5c46ae3b9b5b88e7a866ab7ae4172611733dfb9207bb3cb315
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=candlelight+carol+solo+sheet+music', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to sheet music and the authoring application, suggesting a lure. The presence of numerous Shopify links, while many are confirmed benign, indicates a link farm strategy. The ML classifier strongly indicates maliciousness.

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=candlelight+carol+solo+sheet+music
    • http://rujid.steve-elardo.com/uploads/1/3/2/3/132302720/wetopajotiraw.pdf
    • http://tuseru.portfolioinmotion.com/uploads/1/3/1/3/131383908/vuganuvis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/anatomy_of_human_bones.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/cbt_for_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/nameroxakuwuzekowiwafuxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/93720595745.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/41787920705.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/madea_goes_to_jail_gomovies.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/39895053847.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/69403310068.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/23005354002.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/can_ps3_play_ps2_games.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_off0000603c.bin
3dbcd7a722d16359c3e9f464ae4a45dbca598ba0c31e4710203d9653050542cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603C 5260 bytes
font_01_sfnt_off000071eb.bin
c5d9b5f03b4221ef27042448e2710df6c165ea66f507744fdd93c7ff4b484789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 15392 bytes
font_02_sfnt_off0000a1a8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A8 4324 bytes

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