Malicious PDF — malware analysis report

Static analysis result for SHA-256 2148d05a14054357…

MALICIOUS

PDF

38.1 KB Created: 2020-08-23 10:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0490b8c0c671919e15f754ed08ef9081 SHA-1: 16ff2f6c02a769a64b1a06a4181b54591b06454d SHA-256: 2148d05a14054357f32db8c38282ad8030350e14503a7d5c3b08487ad3e25ab2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=lagu+aaaa+sad+song', is likely intended to redirect the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute content broadly. 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=lagu+aaaa+sad+song
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • http://files.beitnachum.org/uploads/1/3/1/4/131483253/ximegigojepirez_rabisosip_suwupisi.pdf
    • http://files.southlandvs.com/uploads/1/3/0/7/130776735/4fb8274ee8089.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/equidad_de_genero_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/b._com_auditing_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/57697572838.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/josoxifagevoxisuvela.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/16577756603.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/analog_discovery_2_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/85884439161.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/bamuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/najasifipiwa.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/zemizefonuxebejazarod.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_off00005913.bin
8b0c7e4724377846f52e8916a7a2df51ccc30d3641edb61c601c110fd9f034b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5913 4808 bytes
font_01_sfnt_off00006982.bin
d134cbf13fe4a1e332bb5aa35e59601b6df784fb46dad777712274d65c5baa5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6982 10180 bytes

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