Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2d32580442dcba…

MALICIOUS

PDF

52.3 KB Created: 2020-08-08 22:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9d1128de7aa8476af4770b8f7663af7 SHA-1: 60e22ea4dccda9403ddfd4416b40807985c2a2f3 SHA-256: 1d2d32580442dcbaf52cf5a656045eafda44933b614cbeb80b4f022f6c4f7a0e
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary malicious link directing users to a redirector disguised as a PDF to Word converter. This suggests a phishing or scam attempt to lure users to malicious infrastructure. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=cutepdf%20writer%20convert%20pdf%20to%20word
    • http://files.mychicagodesigner.com/uploads/1/3/2/6/132681946/38ccd.pdf
    • http://sejinoged.onyx84.com/uploads/1/3/1/0/131070146/3379022.pdf
    • http://files.sophiemargolin.com/uploads/1/3/0/7/130775032/faninapisevikezasul.pdf
    • http://salopoz.starseedallianceinternational.com/uploads/1/3/2/7/132712615/bitilugezuv.pdf
    • http://files.lowellmagenealogy.com/uploads/1/3/1/4/131453843/legebevexegi_rimojifuwenus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/35965160350.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/how_to_push_and_pull_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/79788273560.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/3750223315.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/dod_form_2861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/vinixuraravafewovi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/83646473185.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/25280117649.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_off000073e3.bin
c172d8e8990225d3d3200b8fee7c67ed83fe6cf05114aa9ac727e29ed973fa4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 4788 bytes
font_01_sfnt_off00008456.bin
b7a20888f582f90eae7ce000846d86172d1e75ff763f64ff2da655ea484e472b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8456 15952 bytes
font_02_sfnt_off0000b61c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB61C 4324 bytes

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