Malicious PDF — malware analysis report

Static analysis result for SHA-256 457f0c4dab6cad7d…

MALICIOUS

PDF

40.8 KB Created: 2020-09-04 17:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43533c9bb8b23210bdab2ce0d47464af SHA-1: 588f7c178447620f579c932e5dbd1c07a664f33a SHA-256: 457f0c4dab6cad7d62c5c403958f716047cee7cafa1a62811f30f8ed55b005b4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, https://ttraff.me/wix?keyword=air+cooled+condensing+unit+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.me/wix?keyword=air+cooled+condensing+unit+pdf
    • https://static.usrfiles.com/ugd/02af14_e3cc0083fb9747df81e89b7a0e6c59cc.pdf
    • https://static.usrfiles.com/ugd/374ce0_0b94eec91a4b4502a46aac6f1959a439.pdf
    • https://static.usrfiles.com/ugd/61f964_aba24074343f40ad98486a68fefec8df.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b67de8ac186408984b0f9405165d63d.pdf
    • https://static.usrfiles.com/ugd/64d889_ff68382fbefa4f86a3241fb29e45df71.pdf
    • https://static.usrfiles.com/ugd/b98abb_17e6c6d9d56049ecaca8e04a299b4d3a.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_656e45b95996459d87decc6811fd8f70.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/16456042618.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/10018604792.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/kexivifezafozajubusezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0512/files/87750339871.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/cambridge_english_grammar_in_use_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/16360370995.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/dovodejisaxekavesakatomop.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_off00006310.bin
9cd267ad2c91d2f771892c984b4daaa433993cf9f7cd20f888d2c10c7756d71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 5104 bytes
font_01_sfnt_off00007481.bin
8484a7ba38854060705c478ce9396c7c332af1ff0840d7cd20157a6e1d7b4490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 10064 bytes

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