Malicious PDF — malware analysis report

Static analysis result for SHA-256 524a2b401ff42fd3…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 06:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c48e49b13af295af6f01151b9177ac0 SHA-1: a94f8c2655d2b1c3e91c5ad09fecc54e32c38ee7 SHA-256: 524a2b401ff42fd38c0d98e3a9f12bb52e70773300c56dee4041fed3b91232d9
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded links, including one pointing to `https://ttraff.ru/wb?keyword=calendario%202019%20sep%20mexico%20pdf`, are likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated 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.ru/wb?keyword=calendario%202019%20sep%20mexico%20pdf
    • http://files.escondidobattalion.org/uploads/1/3/0/7/130739174/nibir.pdf
    • http://files.thepltoolbox.com/uploads/1/3/1/6/131637714/1736808.pdf
    • http://files.tgja.org/uploads/1/3/1/6/131606335/lerenakega.pdf
    • http://files.eugeneholisticmedicine.com/uploads/1/3/1/6/131636807/nazot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xuvoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/7909/6728/files/42379741635.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/arithmetic_sequence_problem_solving_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/82380952988.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/pusarusawupewito.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/drake_and_josh_seasons.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/76459944684.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/81028089675.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/39045477030.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_off000064b3.bin
675b08f2c77fddd0876022bfc1e03becf77456b2aa57ffb133f81b24c0440a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 5580 bytes
font_01_sfnt_off00007791.bin
889902948f7a85ba04d876d1974990455a8cce47ed68d70a49faa07107277257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7791 11004 bytes
font_02_sfnt_off00009b83.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B83 4324 bytes

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