Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc4dfe97211d376…

MALICIOUS

PDF

54.1 KB Created: 2020-08-30 14:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb97b0b2f46290ffce8b5620e9498728 SHA-1: affc297a64e41eb2896b3a5faeff76fe02015b7d SHA-256: fbc4dfe97211d376cbcf24909763b99afc4db72a710b33c295c5f89e1b9917a9
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as IKEA lock instructions. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a link farm, likely for SEO poisoning or to distribute malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The primary IOC is the redirector URL, which is designed to lure users to a malicious site.

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/wix?keyword=ikea+galant+lock+instructions
    • https://cdn.shopify.com/s/files/1/0433/8342/3126/files/nejurodas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/tiff_file_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/assembly_language_for_x86_processors_solutions_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce64934b18b9454eb1cd4b0ec1c38508.pdf
    • https://static.usrfiles.com/ugd/e745be_9720a1ab01a84b9fad50c7f0d97ab6c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
    • https://static.usrfiles.com/ugd/accd1f_b33007dedbfb4218a7e5bf55b8671900.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb275e7da9c0471490bf517e1f9ab0d3.pdf
    • https://static.usrfiles.com/ugd/97493d_8b05a13bc4de4e1a8f103431ec4a169b.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/40356769243.pdf
    • https://cdn.shopify.com/s/files/1/0452/2046/2743/files/exercices_alphabtisation_adultes_franais.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.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_off00008e7f.bin
a7cccf038828e6d35e1de099bb93e2a553ccb101fe6d81dc555aec061f5312a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7F 4968 bytes
font_01_sfnt_off00009f76.bin
3da383a0b970f58a9820a43835616d38584b5e1438a1ae8a96d6b0d5df28ba3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F76 14164 bytes

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