Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fcad60d8d7756e…

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 12:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87979601fe8fde527194c21b4ff2d0d SHA-1: 5aa27412be7ee191b4a51b24cf8695dafb08efba SHA-256: 58fcad60d8d7756efab5ce056908d633734c32f7d74a8b62517f33fa016c0245
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious link. The presence of a link farm heuristic further suggests a malicious intent to redirect users to external, potentially harmful, content. No scripts were extracted, limiting the analysis of direct payload execution.

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.me/pify?keyword=capitalismo+gore+sayak+valencia+pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/masegejunuxozotufalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/criminal_investigation_swanson_11th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/cardiomiopatia_dilatada.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/xomavedofavivepabopun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/66438325242.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/before_sunset_movie_hdpopcorns.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/77140583715.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/absorcion_hierro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/alphabet_letter_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/acrobat_editor_free.pdf
    • https://static.usrfiles.com/ugd/dd4472_02a97622066c4d0e8a6b92a599f6800d.pdf
    • https://static.usrfiles.com/ugd/dad7b5_50d481ad2d754413bec836940a55e355.pdf
    • https://static.usrfiles.com/ugd/d1c05f_97751e879316458088a90ea889ba5e1b.pdf
    • https://static.usrfiles.com/ugd/0511f5_6bc8bfb10f304a27b5b71f9101e2e3e4.pdf
    • https://static.usrfiles.com/ugd/ea78e0_a03acbbcf755443db22265a49befd9eb.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_off000059e8.bin
42aed1873f3b6a1309b2ab0298fdd5564b53e098bf935a4e4bd2926c839a8435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E8 5608 bytes
font_01_sfnt_off00006cec.bin
bfbf6229604692ebf8a695fdf78bd8bab4332ae12070482a669f7b534fde6a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 10216 bytes

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