Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a1abf0404cb936…

MALICIOUS

PDF

36.4 KB Created: 2020-08-14 21:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977fd58e79a61a7b3787f843833f11c4 SHA-1: 97cfd1f5808ce7c54509d55de675ed0110076bb2 SHA-256: c9a1abf0404cb936e60968bf0ac0bde4840c6bc4c405f44293e0f13dfc556e97
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=edgeswitch+24+lite+datasheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0432/3724/5086/files/98229770395.pdf'. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the target URL, reinforcing the malicious intent.

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/pify?keyword=edgeswitch+24+lite+datasheet
    • http://files.impactdesign.co/uploads/1/3/1/1/131163634/kages-xolurumixen-zisuzoxa.pdf
    • http://fitop.sjchocolates.com/uploads/1/3/1/1/131163494/vofevefoteku.pdf
    • http://files.sacredspacesyoga.com/uploads/1/3/0/8/130814127/e5c9022b.pdf
    • http://files.the32nd.org/uploads/1/3/2/6/132682758/pisopilakuxaw-zudozezulebij-lexirataka-dopovete.pdf
    • http://files.phoenixtherise.com/uploads/1/3/2/6/132695493/0645c2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/98229770395.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/36360023529.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/calculus_early_transcendental_functions_4th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7790/files/legal_aspects_of_healthcare_administration_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4167/files/nadifekarubupok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/42865461322.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/lalupezijoxifon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/98937696459.pdf
    • https://cdn.shopify.com/s/files/1/0433/0340/3678/files/72567729661.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/fekidexogufi.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_off00004caf.bin
36934dd86271b9613aa93dd8e55100402fd46c93731c7ee63e2407b7b36178f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CAF 5376 bytes
font_01_sfnt_off00005f13.bin
1c26c1d913aeabc59d2c30d789bf554a4ca4e4c4e393e5c56b3a69344c07558f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 10624 bytes