Malicious PDF — malware analysis report

Static analysis result for SHA-256 20936030abfad065…

MALICIOUS

PDF

36.2 KB Created: 2020-07-31 22:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3ee177aeaa8bf7d8c31165849112ce SHA-1: 0460403f30d25808a569b77de363f692fa94a04e SHA-256: 20936030abfad065b4f56a108257cafdbb1b7f0f247790445dfc0d51ca8fff70
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.com/pify?keyword=saxon+algebra+2+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same lure text, suggesting the primary purpose is to trick users into clicking the malicious redirector URL.

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=saxon+algebra+2+answers
    • http://files.melodyrgreenbooks.com/uploads/1/3/0/8/130815437/c01c02a8.pdf
    • http://files.cfbinc.com/uploads/1/3/0/7/130775982/feninexixoges.pdf
    • http://files.buildabow.ca/uploads/1/3/0/7/130739340/dasawenajelarib.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/garejupugoradowixat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/tizadinakisekuxafisipodak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/punudupupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/76820505853.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/tiloda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/zutadokazaxeputi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/96288318884.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/lenekuputopakopugitemeref.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/98881566528.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/20950624102.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/xokilozujodikobowafelumal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/99914762785.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_off00004f02.bin
62f3aeb6bafbaa609dfb850cc03fb598f897fd87679c3e639008470bc8c9effd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F02 5388 bytes
font_01_sfnt_off00006179.bin
9ea5d8987b4a8ed1c07b603be4057d63e0119274fcacae86dfdfb2f7688fc409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 10232 bytes

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