Malicious PDF — malware analysis report

Static analysis result for SHA-256 463f6365dbf7c0c6…

MALICIOUS

PDF

47.8 KB Created: 2020-08-09 23:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7febf4fc5bb73c2c498cfe6ca93e86e SHA-1: fa9905b8a5404b8c95fdc6d4d5970294acfb8e27 SHA-256: 463f6365dbf7c0c6149d7945df7829415a3a805c152c1553aeb71b65c3458ffb
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The majority of these links point to a Shopify domain, forming a link farm. This suggests a campaign focused on SEO manipulation or redirecting users to potentially harmful content, rather than direct exploitation within the PDF itself. The ML classifier strongly supports the malicious nature of the file.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=java+swing+gui+tutorial+netbeans+pdf
    • http://files.mcbaronfootball.com/uploads/1/3/2/3/132302735/zewosozofosazi.pdf
    • http://garusi.anthonymariedesigns.com/uploads/1/3/0/8/130874493/5177259.pdf
    • http://dipituxop.rusticchalkdecorshop.com/uploads/1/3/0/7/130775085/binomenitotuwobe.pdf
    • http://xegizag.bigredhen.org/uploads/1/3/2/3/132303382/vefupapimixiku_vagonapuw.pdf
    • http://files.exton-village-hall.com/uploads/1/3/0/7/130739366/gugudapojupupum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/80263636833.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/asp_net_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/6044/3813/files/sales_process_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/98682951192.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9203/files/kalaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/vizelulelaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5285/0586/files/99666592961.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8176/files/believer_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/3890643982.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/aryavarta_chronicles_kurukshetra.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/20997785736.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/46185945448.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2507/files/kepejusefopur.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_off00007c7c.bin
a39c30353bfbf32bb70c57f7c1a80d471c1fe8112e3df3df495a7f1f8900cff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7C 5488 bytes
font_01_sfnt_off00008f4a.bin
9cdc72c2990e66f6c7e727493fe88887bba476f9c97fff3f1211cbf439ef05bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4A 10248 bytes

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