Malicious PDF — malware analysis report

Static analysis result for SHA-256 d172881e422e17dd…

MALICIOUS

PDF

41.3 KB Created: 2020-07-27 20:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac201c49a2a500de89c9c5c53209c993 SHA-1: 1dcfd67a29c1c09501f206763cc3dd3412d77c87 SHA-256: d172881e422e17dd755ed10175e23b41e1ac3bfab98003501c15e7eb34bf3f3f
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to Android development, likely intended to disguise the malicious intent of the embedded links. The primary attack vector is likely a phishing attempt leveraging these links to redirect users to malicious content.

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=android+studio+floating+action+button+background+color
    • http://files.sandcastletreasures.com/uploads/1/3/0/7/130739918/952efea14f99d.pdf
    • http://files.myscrubsandmore.com/uploads/1/3/1/6/131606396/2019712.pdf
    • http://files.stanleyboxing.com/uploads/1/3/2/6/132695200/8ed68fc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0432/3131/4077/files/nuvekajotor.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/puzebefesepakebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/91494072165.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/56793904431.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/xelivewexinozof.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/32386401908.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/94151888901.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/85734768144.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/liwopawabisit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/18781268728.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/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006146.bin
5b33c085c81c98f575aede91ea57e1e4316f1fe508f822c0e0630e9f34c6a697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 5148 bytes
font_01_sfnt_off000072ca.bin
cf0d8037e1d88305871db91d60d25e52d005725839c581e90bfb35ca23ae061a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 10924 bytes

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