Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd73c837bdc0de96…

MALICIOUS

PDF

48.7 KB Created: 2020-08-19 01:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cbfe33c8e0e7714c2d2aff673422a6a SHA-1: 9e569c511cc8239ccc4688df2de3da799a4fad7d SHA-256: cd73c837bdc0de9617642e3677f449ea56dac0983295a18f6a478d4bc5d24286
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or scam attempt disguised as a resource for image editing, aiming to lead the user to malicious content.

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=background+photo+hd+for+editing
    • http://files.mcgrathirishdancers.com/uploads/1/3/1/3/131380564/kinorivujokitewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/81993316427.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/furepofagozipagigapuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/2614689655.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/64596940681.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/65862149879.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/49154321703.pdf
    • https://cdn.shopify.com/s/files/1/0452/1807/0685/files/bukusugutarejafabakod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/fokirolalerinigujunit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/36479114407.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/44622847024.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_off00008162.bin
8303b3cb68efc66e03ece824be8e6bf6cbb0e7891d13a4f134d3bdd37ec4332e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 5320 bytes
font_01_sfnt_off00009371.bin
20ea65c6546646ee5d2221cf7d7e727502c43de9c1b41af8b840feedb06334eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 10156 bytes

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