Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b659012b29ea7b1…

MALICIOUS

PDF

39.8 KB Created: 2020-09-09 08:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab46e832de8b36b6ef9d39adf6cad758 SHA-1: 36c4d22b9b9198949e7f1c359c67f18063f1df4b SHA-256: 9b659012b29ea7b1ae8d50f1c2cf37c75ccc0e431005a653db86d61c64f77d9f
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that prompts the user to download a 'cactus video plugin'. This link leads to a link farm of numerous other PDFs hosted on Shopify, suggesting a phishing or scam campaign. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=cactus+video+plugin
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/wofezoxenikimefumizobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/careplus_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/45494837500.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/dugamir.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb05d675a814a1c921afd71bf13eed9.pdf
    • https://static.usrfiles.com/ugd/c722c2_dfb219c6413f4a17b79071db1093dcb0.pdf
    • https://static.usrfiles.com/ugd/ff2e72_9aab948a3d8745d09d45a06ed18be6f9.pdf
    • https://static.usrfiles.com/ugd/dc6899_c093cb571f4d46a18e318befe72a18f6.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/bhangra_dance_video_songs_2016.pdf
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/vipakejifarapepag.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/what_is_more_accountable_form_of_government.pdf
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/corporate_finance_and_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0461/7256/9753/files/jaremu.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_off00005ee3.bin
23da8439bc3e035b1a0e6dee4587116bad9e6dcfba7e1c19a8211b7545300fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE3 5108 bytes
font_01_sfnt_off0000705c.bin
848d76e571b1d92a1771b17a35085ab2279f5e472ac0887d29720345ec40f982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 10092 bytes

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