Malicious PDF — malware analysis report

Static analysis result for SHA-256 a029a5ce24155d4b…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 01:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7150bca05741f1c7e2a6715413e21cc SHA-1: 37747e910a716afae24294843129ae8cc43e2745 SHA-256: a029a5ce24155d4b80056ec2e10c16d8c1ba5cb158d36fbb4cf058ced3527913
150 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 one heuristic specifically identifying a malicious redirector link to 'ttraff.com'. Another heuristic indicates a large PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the volume of malicious links 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.com/wix?keyword=citing+website+apa+format+in+text
    • https://static.usrfiles.com/ugd/4117a9_2fd3b46738a34629bf9763827a4dbb00.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0aabbc553d042b99877955f06c725cc.pdf
    • https://static.usrfiles.com/ugd/2f7815_38e1b14a806742faadaf38e9a5101924.pdf
    • https://static.usrfiles.com/ugd/96768c_d0cdfda880dd4adf96029a6fda893623.pdf
    • https://static.usrfiles.com/ugd/e5a943_9e81459f59f048cea76646674026ee70.pdf
    • https://cdn.shopify.com/s/files/1/0463/3713/0658/files/bhagavad_gita_as_it_is_iskcon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91337380597.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/vapuxez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/actus_performance_login.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/30519344430.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/boarding_pass_template_for_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/44550061007.pdf
    • https://cdn.shopify.com/s/files/1/0464/2347/4328/files/liretaval.pdf
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/50443887243.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/matakonobomumusex.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_off000061e5.bin
fff5aca485ae5186d7883e912e73691b8bda6a62861da325b3f27eccecf001b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 5392 bytes
font_01_sfnt_off0000743c.bin
ee9e47810e1eab8b42d0617e63faf23ee400a0e64f601b175da614ab4a2af8be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 9952 bytes

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