Malicious PDF — malware analysis report

Static analysis result for SHA-256 52df1b8b7ff92db7…

MALICIOUS

PDF

52.2 KB Created: 2020-07-23 16:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6d34c3b84a416ea8dc6edc9b46000d4 SHA-1: 40b96fc693b4ebbd7ce4270258850af9087010f4 SHA-256: 52df1b8b7ff92db70be890276141b3f6b2ec51c6d37678e815f29cdb95ba60c0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains keywords related to medical conditions, likely used as lures. No scripts were extracted from this sample.

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=hypoplasia+of+the+cerebellum+malformation
    • http://files.pennyormsbee.ca/uploads/1/3/0/7/130775232/2738980.pdf
    • http://files.megastone100.com/uploads/1/3/1/3/131379680/kixenonutenam.pdf
    • http://files.castlesjewelry-gifts.com/uploads/1/3/1/3/131379506/0eedd9ae60d80.pdf
    • http://files.fitscience.net/uploads/1/3/1/8/131856162/6714994.pdf
    • http://files.castlesjewelry-gifts.com/uploads/1/3/1/3/131379506/0eedd9a
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/bijivakutazuwakawer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/vatitamud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/27209935892.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/20771617857.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/39434189973.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/wosekerurojifomogodasir.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/zexavuzofezidixoxekikov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/2990708282.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/42005355041.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/47764739980.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_off00008dcd.bin
4e71d6be05b261f6ac1b0053462ae37fe6e4daf54c23384c88be1ff4d5b13224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCD 5340 bytes
font_01_sfnt_off00009fc7.bin
ce36b23bf31eccd3377196ea718698363d85546b5e120f90c9c7c61f2c71e7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC7 10532 bytes

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