Malicious PDF — malware analysis report

Static analysis result for SHA-256 240c7bbd6a946aef…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 03:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffc8dfe64006715de67cb23c4f09695 SHA-1: 4323fd2aedc169b7a0f571b973f3ebfaadb7c238 SHA-256: 240c7bbd6a946aefb06655c6f12dbeccfa744163eaa19a2482eae36535d9f49c
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The presence of a large link farm, many pointing to Shopify domains, suggests an SEO poisoning or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link manipulation is the primary indicator of malicious intent.

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.ru/wix?keyword=sony+cyber+shot+g+10x+optical+zoom+manual
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/spektrum_dx6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/kefaboxago.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/19689817425.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/58490441226.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4204/files/nisotas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/mibul.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/79362983142.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/anatomy_directional_terms_practice_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/38515373622.pdf
    • https://static.usrfiles.com/ugd/b8c837_734f0021fc9e4a6093b275344b3cafcb.pdf
    • https://static.usrfiles.com/ugd/5b9a87_7233172609964c2a8946ee4485b04159.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e06fc5fe7142e8833420b4b276a4ec.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f18.bin
cb0807d0a2799df190148079694edc2b07aece5ac96edd38358d7a4f64b3b021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 5888 bytes
font_01_sfnt_off00007304.bin
262ce4ed885592dec6c82678e370a75d6f2b97009c1d15c26455b8efced9a39e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7304 10544 bytes
font_02_sfnt_off0000971d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971D 4324 bytes

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