Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8fb079cbed0f22…

MALICIOUS

PDF

48.7 KB Created: 2020-08-24 02:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fb29f9a84a6501cab4fc7af026dc3a5 SHA-1: 1c80de7a7939a1d252c8a32135670cc8165dcef7 SHA-256: fc8fb079cbed0f228942f545a016c705d9f66e922ced96f9517d849d9ac8c882
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high density of embedded links, many of which point to known redirector infrastructure or appear to be part of a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=old+afghan+songs+free. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it was programmatically generated to host these links.

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/pify?keyword=old+afghan+songs+free
    • http://mawuk.cantyschool.org/uploads/1/3/2/6/132681670/3781269.pdf
    • http://files.cartravelsafety.com/uploads/1/3/2/6/132681954/b2ba24be79c.pdf
    • http://files.tabdoughertyart.com/uploads/1/3/1/4/131455141/5852835.pdf
    • http://dadugejo.kristankoutureboutique.com/uploads/1/3/0/7/130738946/direkakavuje_darebu_tijibisogexosi.pdf
    • http://zijimev.gmtmt.com/uploads/1/3/2/8/132814930/xokukofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/mimodiralososazowi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/70781041790.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/raxido.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/maxabelajajogekusiwivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0690/files/jizoxiwame.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/wutigupezupusatuni.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/tufewenurarenaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/additive_manufacturing_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/differentiated_lesson_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/estadistica_para_administracion_y_economia_anderson_8_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/52511522073.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_off0000711a.bin
30813899a85d5a97eab0aa6c9d36bb803c0e5ea26888f0bab81c22d3eb8d0b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 5196 bytes
font_01_sfnt_off000082c1.bin
ae01e2e0c8601b934bc524c0cb3c9e00fdfbb741b55123abfff19da492ab1fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C1 15844 bytes

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