Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d4982bb56413ef…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 12:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be0da42f69727fcc5c24a2dca963feab SHA-1: e8d21d394484b0bddf6029b8bddeeea6fd9fb1b0 SHA-256: 25d4982bb56413efc62343f6820addf8e65e9dba52af1f6ba67cb5403d183ccc
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, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirection tactic to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector is the primary indicator of compromise.

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=catharanthus+roseus+propiedades+medicinales+pdf
    • http://xigeti.earldthomas.org/uploads/1/3/1/1/131163635/wokosufafowumav.pdf
    • http://tagemovi.cos-medics.com/uploads/1/3/0/7/130776445/noxuwixiz.pdf
    • http://files.katatheironthorn.com/uploads/1/3/0/7/130739746/garamunebunakup.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/panasonic_toughbook_cf-_28_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/58160217563.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/sap_basis_course_content.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/26443984941.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/kofigegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5306/files/wokisog.pdf
    • https://cdn.shopify.com/s/files/1/0438/3267/2418/files/curso_de_frances_para_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/pugidunotomimadovok.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/lipakoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/tixipirikojefiwidaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/xojisosiseragidar.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/winikidibiloxusedij.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_off00006d9e.bin
254fe3234a7bb62aeed39f439efbbb5741f3aa9b2c44e9db4b74f2bf6350a12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9E 5300 bytes
font_01_sfnt_off00007f7c.bin
26bd38dd76339d3e48a313d51797c2494b20f9ad7a4c76f8f3815bf1bebd1261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10104 bytes

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