Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1fc6cd06d5d88b…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 04:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1e7b7f6458cb912279223bdd757528 SHA-1: 1eb0dde041dd0bbd850529c42c8222803fb4951b SHA-256: 2d1fc6cd06d5d88b5ae18c5f60d5e6dc959c1bceeb8b5ea593ad6f8f354f9be7
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'direct debit form template word'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier also flagged the document as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The primary malicious IOC is the ttraff.com redirector.

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=direct+debit+form+template+word
    • http://files.oneserp.com/uploads/1/3/0/9/130970012/2bb74.pdf
    • http://files.hunterdongardenguild.org/uploads/1/3/1/4/131438501/tisotisonenut.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/dotodojurukojeja.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/jibugelalobamupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/adelle_sans_bold_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7516/4574/files/72466452270.pdf
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/mechanics_of_materials_hibbeler_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/texifasadilavemovurilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/63485957869.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/wudatajawafaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/numesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/26305977744.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/sejidemibatawud.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8383/files/wosedovituxunototi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f49.bin
d1475e1f4770f89f30688c53f9b7277c911a824c50e7dfab4c5d1a75bdb21540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F49 5036 bytes
font_01_sfnt_off00007072.bin
c565a5631cbe2178b4fa64d584eee0e8edc2fad5127238dc06a36b328b433774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7072 10164 bytes
font_02_sfnt_off00009324.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9324 4324 bytes

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