Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36b36e1ea90a527…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 21:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2221d04e07d0c55c524f1f5cfacd62b SHA-1: 508bb7e08519e69a8d943e4e074ff03e1f9a9274 SHA-256: f36b36e1ea90a5277e78ebb8ea1ff4352fd5021635fcfcb2691a94bd87a69dae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to shopify.com domains, but one critical link redirects through ttraff.cc, a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL that is used in the redirector. This suggests a phishing or malware delivery attempt.

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=fontana+lake+fishing+report+2018
    • http://wutux.coloradowheatens.com/uploads/1/3/2/8/132816165/b13f0.pdf
    • http://kujaj.schultzwines.com/uploads/1/3/1/3/131379290/01956e945f99.pdf
    • http://xaxudor.skylinemediacast.com/uploads/1/3/0/8/130874359/bae736418793c21.pdf
    • http://nojesoga.safespacesupervision.co.uk/uploads/1/3/2/6/132695839/8017293.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/22687514725.pdf
    • https://cdn.shopify.com/s/files/1/0433/9191/0038/files/91851476181.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/android_ui_automation_testing.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/31767624621.pdf
    • https://cdn.shopify.com/s/files/1/0430/5833/1799/files/laviginu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8705/files/73350263147.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/dodelanuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/tavidotajoxuzogiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/75316862745.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8135/files/old_forge_trail_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/modal_verbs_obligation_and_necessity_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0459/7225/8983/files/lejuvovoxinonavuwuwev.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_off00006b0e.bin
6159828d83eac6ec531fd6bcd24b969df3c9b379889c2d60eab4541a94382f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0E 5700 bytes
font_01_sfnt_off00007e7c.bin
b5d4840625cfcc22b951b9af895ee253279ed25e97384431534464d26c3d9e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 10552 bytes

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