Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a617d41e788fa8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-24 23:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66e7cdbc5a5dd593fd0c994b8903d5c4 SHA-1: b8a0183fd0530d85a71910ceabc26b3332ca613f SHA-256: 39a617d41e788fa8110ed27c7ab293945425309672374f77e8c69fd93fdc3831
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=number+line+to+1000+year+3+worksheet'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to click this link. 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=number+line+to+1000+year+3+worksheet
    • http://files.malleuspublishing.com/uploads/1/3/1/4/131453799/6582409.pdf
    • http://bavuliwo.kingstonwestdental.ca/uploads/1/3/2/3/132303338/fdad2331c2d3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5469/files/google_takeout_api.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/pibemu.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/france_24_reporters.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88406012193.pdf
    • https://cdn.shopify.com/s/files/1/0440/8734/5304/files/any_further_information_to_support_your_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/14785178147.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/2419955753.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/42218645175.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_off000068c8.bin
4a83627f0c5536bc3f79f5180e7a4017960c48b814afe1fc65ac13c3a2460050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5532 bytes
font_01_sfnt_off00007b7e.bin
6d20a891dd52233d345d0ce284e7e5fed2cce4b0803327e11b9c1fc8f25f9dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7E 10176 bytes
font_02_sfnt_off00009e5f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5F 4324 bytes

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