Malicious PDF — malware analysis report

Static analysis result for SHA-256 286231ab9fba3938…

MALICIOUS

PDF

46.3 KB Created: 2020-07-26 16:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d48d8915af66f2bb149acc20adc9dd1 SHA-1: 2bfdf1e0142fecd3047825b95a79dcec9078e505 SHA-256: 286231ab9fba393802df20a48f6d9c27ba4586df4d67cc7c07e09330fe716173
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document likely uses a password-protected archive lure to bypass security measures. The embedded URL is presented as a macro button, suggesting a social engineering tactic to trick the user into clicking it, leading to the malicious redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=agar.+io+macro+button
    • http://files.sdstarresources.org/uploads/1/3/0/7/130739404/1da4a282f7f.pdf
    • http://files.heartcbarrelhorses.com/uploads/1/3/2/6/132680808/4598166.pdf
    • http://files.michaelcozzaglass.com/uploads/1/3/0/8/130813037/xodepipo_notevotilokiki.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/74983498023.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/29002943926.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/13600084495.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/42063034169.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/satirimasimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/73096713569.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/8949063945.pdf
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/57922217628.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/56440420198.pdf
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/81122587689.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/gokovefekajironesaf.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_off000075b2.bin
c29218a025b211d2222cb5da2737f599281362a996c3d14c134a39c77b22ca87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 4832 bytes
font_01_sfnt_off00008601.bin
00cd22f05805e59f37fd3b2186ae9cd17a22b4afb66bb8d8923a9a9c757ef289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8601 11408 bytes

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