Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaaea23a531113e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-24 18:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6cd5fc8757c142fb47449626865fb7 SHA-1: 559fcb027a2a515fae21753aaa98ff375fba6c1a SHA-256: bbaaea23a531113e51a374494214b6e07a1931eb24d5199b92be5b8cd69b0ec4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=thank+you+letter+to+vendor+template'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also 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=thank+you+letter+to+vendor+template
    • http://witeguwi.ffcdelaware.com/uploads/1/3/0/7/130776445/mumerixidese.pdf
    • http://lipoxuxiv.shawnhopkinsauthor.com/uploads/1/3/1/6/131606149/waboboreviji-tanijuves.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/24824727984.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/49658906139.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/guidelines_for_pap_smear_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/illya_alarm_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/geoffrey_local_anesthesia.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/
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/24824

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000704e.bin
1613502145465164b7a8c5344a93be598788cf4179dfaf94875d837876104aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 5196 bytes
font_01_sfnt_off000081ce.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 1800 bytes
font_02_sfnt_off00008a5e.bin
f9bd13ba52cd502149a445f29c1bcf77e3576ee3e1fcf793fbe37e666a55fc0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5E 10380 bytes

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