Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc67fe7e4ce9b29…

MALICIOUS

PDF

50.9 KB Created: 2020-08-11 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f30e884fdd1d4905a898074538846e SHA-1: 6726ec175fcac4789bc289da4de8cbf1c5792f0a SHA-256: cfc67fe7e4ce9b29631217f53319ba03c26e9083cad6259d5bafd9ef5bcf9dc8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.com', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the primary malicious URL.

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.com/pify?keyword=2d+array+c+pdf
    • http://files.karenhk.com/uploads/1/3/2/6/132680955/dodemebazefukuwewel.pdf
    • http://files.staytrue2yourself.com/uploads/1/3/1/4/131453384/107918.pdf
    • http://files.realwomenrealjewelry.com/uploads/1/3/2/6/132681494/4834819.pdf
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/cahier_de_charge_pour_site_web.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/xuwumezebokajadimepit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/33047534167.pdf
    • https://cdn.shopify.com/s/files/1/0430/2913/5521/files/mukijijojuwobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/finnegan_neonatal_abstinence_scoring_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/5770/9210/files/antidiabetic_drug_interactions.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/reducing_and_non_reducing_sugars.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/lijabetimuse.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/arteri_perifer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/wamowawuguxavuxik.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/coordinate_geometry_class_10_ncert.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_off00007e27.bin
f86c72f84f009fc191a4d950ec5ddcd01fb5897d2cba6bb5f7c2c49d4bf39e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E27 5076 bytes
font_01_sfnt_off00008f7b.bin
c9fe13cbbfbac86200fd05dfa9e343c6c5cf3d6b37bce6f5bd2560babe6cfbb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7B 15160 bytes

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