Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec9b2904fc0cec…

MALICIOUS

PDF

47.3 KB Created: 2020-08-18 18:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18e241943ff97be926df351787dac0f SHA-1: c29b8469db2192e6e1783e3a45e71101cd1f81a6 SHA-256: f8ec9b2904fc0cecb502ea97cb6f27fb77ae60c7ba5022215fabbb2ee0af9fb6
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting it's the primary lure. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector URL suggests the document is part of a phishing or scam campaign.

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=single+bed+size+sheets+uk
    • http://jirunoge.saintjamesdanbury.org/uploads/1/3/2/6/132695325/463aaa1e2372cd.pdf
    • http://files.miles7one.com/uploads/1/3/0/8/130813859/davopopogifaxo_zavofimaxiro.pdf
    • http://wukot.constant4mayor.com/uploads/1/3/1/8/131872055/6003f63672c198.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/46490128172.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/jesadajifetonuzoxotitoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/lulimesoweborifirir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/pastor_belga_malinois_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/96225126106.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8752/files/naming_aldehydes_and_ketones_practice_problems.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/22055474806.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/brain_teaser_questions_without_answer.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/15987315415.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/1/042

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b15.bin
ed516c0e55f2ced30536845c9981872ad0e3db22d5568d404fd90e257f4fe601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B15 5140 bytes
font_01_sfnt_off00008c8e.bin
316cbf71b74d58860fbca5529e2cc2e71ed4dd2e8059ec93961336810d966a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8E 10420 bytes

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