Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc1cd502e278245…

MALICIOUS

PDF

39.3 KB Created: 2020-08-08 18:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6039d0e8a274b16d96dc483e19284afe SHA-1: b6d2bb26b59cc58e0203adc7326d4a1ad138b507 SHA-256: 4dc1cd502e278245d698ca2c094edc1773be36e41c2bb4855b25feeef2f6932f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and other benign-looking PDF links, suggesting a lure to a malicious site. 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.com/pify?keyword=developing+skills+for+the+toeic+test+pdf
    • http://files.kristibridgeman.com/uploads/1/3/0/9/130969989/2504948.pdf
    • http://files.endodiabetes.com/uploads/1/3/1/4/131437283/lifebex.pdf
    • http://files.letstalkdubs.com/uploads/1/3/0/7/130776728/97f861d12962.pdf
    • http://files.giantcomet.co.uk/uploads/1/3/1/1/131163712/41091.pdf
    • http://xiseka.alchemybespokefurniture.com/uploads/1/3/0/9/130969368/7408422.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/the_cask_of_amontillado_characters.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/zumubudubafaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7442/0890/files/posibixipebubiwofuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/42915591235.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/19148430210.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/xuxilaxawajejalide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/waxesazuvijakilodoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/dopozipoxijex.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/sasekagenesi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/31401990261.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_off00005a50.bin
4740b7bcc8b86d81fd1329472696f3ee034e49f3ecb0e822b3729b0b7a2d794d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A50 5328 bytes
font_01_sfnt_off00006c84.bin
b5d05409e020bf6442fa98ea6802736168a8e7629d1c3a8266773babaeb6b6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C84 10992 bytes

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