Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c9178184defb64…

MALICIOUS

PDF

78.7 KB Created: 2020-08-24 16:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7834b9908424113e75295aaf7aa9ee5 SHA-1: eecb86a5817d0aed18690aad5b502657e8c7a06d SHA-256: a2c9178184defb64e6f3e4d975a558e8e5884fc0c8c605e2e031adbcd6105c7d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=antologia+literaria+5+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0432/2587/4600/files/architectural_design_books_free_download.pdf'. The document body, though heavily obfuscated, contains the lure text 'Antologia literaria 5 pdf' and the redirector URL, suggesting a social engineering tactic to trick users into downloading malicious content.

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=antologia+literaria+5+pdf
    • http://fipojit.walkerspringsbaptistacademy.com/uploads/1/3/1/4/131437914/390601.pdf
    • http://files.impartalliance.org/uploads/1/3/1/4/131407625/2be183272a3.pdf
    • http://gulukom.biochemmathstutor.com/uploads/1/3/1/6/131606289/1ec3e5e9da2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2587/4600/files/architectural_design_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/pycharm.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/24712674361.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9082/files/nunuridapexekomoxagur.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/microsoft_net_famework_1._1.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/jefagejusorubunikunubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/18572541264.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/agenda_planner_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/difference_between_centripetal_and_centrifugal_force.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/adawat_novel_download.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_off0000f852.bin
961de16e16a43b95aa2b898c98c41a6e416bde9e58e20ca1e82ce9e20facf693		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 5144 bytes
font_01_sfnt_off000109e4.bin
8857cde707d7e7933d0ccb740f7522b3e2c9c3a2c04845362124126f733af516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 10620 bytes

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