Malicious PDF — malware analysis report

Static analysis result for SHA-256 397d4797248916a5…

MALICIOUS

PDF

34.5 KB Created: 2020-09-17 01:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03ea9ad5c10280f8a6a67ebf655273cb SHA-1: 7379853d107033e1617e00f5030228f382248648 SHA-256: 397d4797248916a5fd4d916eade85cdda0dd9ce0e7c73c677845ee130a52b520
150 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a significant number of embedded links, many of which point to suspicious domains. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests the PDF is designed to lure users into clicking malicious links, likely for phishing or malware delivery.

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.me/wix?keyword=palermos+pizza+beloit+number
    • http://files.sevahealingarts.com/uploads/1/3/0/7/130776255/nelipipe.pdf
    • http://daneki.trailcoffeecompany.com/uploads/1/3/2/6/132681790/nofumobana_jaraza_kejopa.pdf
    • http://rajanifu.misticgaming.com/uploads/1/3/0/8/130814526/pozevovusitawip-dipakeridiwi-vanakinotedavar-gabulara.pdf
    • http://gonuzun.anneliessteenjewellery.com/uploads/1/3/0/8/130873848/8bc40.pdf
    • http://files.thisdiaspora.net/uploads/1/3/0/7/130740325/visam-xojezifolusube.pdf
    • http://files.softwashing.com/uploads/1/3/2/6/132681901/waxubokug.pdf
    • http://files.jbeautystudio.com/uploads/1/3/0/7/130739316/girajisixu-sakawamoweron-gorigamoxe.pdf
    • https://cdn.shopify.com/s/files/1/0463/2585/8459/files/letter_of_credit_trade_finance_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/affective_domain.pdf
    • https://50529b55-12fe-402d-8754-e017fdeb2bfd.filesusr.com/ugd/4f270c_574a10079f5b4d18a7400303e2f342e2.pdf?index=true
    • https://24b1b06d-9398-40a4-94d5-d67e1615a0b4.filesusr.com/ugd/8db125_ae67dac27b454bf6a176b9addf30e5d4.pdf?index=true
    • https://b9e4b5b1-1fb2-491a-bf30-b242949f85be.filesusr.com/ugd/65e777_dc7e7bf4553f4a17ab1d3aecabeb3396.pdf?index=true
    • https://4400648d-9a04-40b1-9ce6-44d52f840f71.filesusr.com/ugd/bb10c5_236c814aed6e4fa4bfc6479ec07cfb27.pdf?index=true
    • 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_off00004937.bin
7b9981c7eb6157f800b424e9cf55467284f20de5bca762e02d48642c06409785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4937 5156 bytes
font_01_sfnt_off00005aac.bin
55e763faeea679a5bf83ef76101657105bd2e19d3350970735d8de4fc57f5ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAC 10200 bytes

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