Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b54b66c10bcd495…

MALICIOUS

PDF

43.9 KB Created: 2020-08-03 07:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1eea17f2ac0fe7b199ce76daec3d831 SHA-1: a8eff2ee712ea03b3359cf7ae594dfac8d525396 SHA-256: 4b54b66c10bcd495a93c593292d6b8917cd62aeee55a5503369f04988a100eec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as 'https://ttraff.cc/pify?keyword=mac+tts+voices'. This URL is likely used to direct the user to a malicious site. The PDF's content, though heavily obfuscated, includes references to 'Mac tts voices', suggesting a lure to entice clicks. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=mac+tts+voices
    • http://files.angryblackwomyn.com/uploads/1/3/0/9/130969322/ranomopizilusata.pdf
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdf
    • http://files.beginwithyourskinmedspa.com/uploads/1/3/0/7/130738484/kulamamuf-dosulu-guzan-tadexebewolifed.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/74463642220.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/3x3_inverse_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/tosesosopajotisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/viper_479v_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/navy_advancement_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3751/4133/files/wekixokajuruvutesopepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/dolupe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/5364270088.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/28995917548.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/fomezanokonopujob.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/25546258520.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/kuxutirizomifuna.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_off00006d49.bin
90ba89130c4ec548f95941f3f2cea5b7c9b36b3dd03541c3443f1199e3ca4fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D49 4732 bytes
font_01_sfnt_off00007d86.bin
0f308bd2a29b4c00c9cfd85ef2cb7af2d6e6aa9089fe56aa224cfdb2bec4d413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 10912 bytes

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