Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6994330d120c6de…

MALICIOUS

PDF

44.3 KB Created: 2020-09-01 09:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aafa3fee4a2bc0e1193a0b09bac364ce SHA-1: ef4ddaf311219cce7c6994bb99ba2c3884cf1af5 SHA-256: f6994330d120c6deca7ea364c9d0e90e1d6356b79f08121c50fb258fbf8c2fe5
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a product manual. The primary malicious URL is a redirector that likely leads to further malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.link/pify?keyword=cooler+master+devastator+3+manual
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/make_business_card_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/6752/4518/files/australian_tourist_visa_application_form_600.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/paper_mario_ttyd_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/nexetuges.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/5357269813.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/jurnal_pluralisme_budaya.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/95844707932.pdf
    • https://static.usrfiles.com/ugd/35e1ce_9742f295972447f4a6f44a6d147fe55b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e351e3df7bf145329e5c41dbc474af0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f5505025d5b4854ab95cd8b73e34d04.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d019b8bbcd4ebda7b4fe1d0639c6ba.pdf
    • https://static.usrfiles.com/ugd/26481d_6455c8625f654dca927b514dc548357a.pdf
    • https://static.usrfiles.com/ugd/b56239_8327ea7be4194ca69fecc0ad82aba86e.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_off00006ec2.bin
8eb97202e363a025765c89f3587dad95ba919e8c8c868ba4a84fa0a7eef54322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 5100 bytes
font_01_sfnt_off00008002.bin
82964f00af5f988d976328ddeaad1f6f8be8f90e7760cc4c3f5646bce5f92280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 10716 bytes

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