Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c39d9df98b7d8df…

MALICIOUS

PDF

43.9 KB Created: 2020-08-06 22:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d4b9142aa2118487925b1c02263c54e SHA-1: 7f9bdb585aa2e0e766b5aa08cae90c72fddb601f SHA-256: 8c39d9df98b7d8df4c037feb1facb95f9ac0c0ea74a3954ccb0cb872af79ce7b
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=acidosis+metabolica+causas+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a link farm further supports a malicious distribution strategy.

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.ru/pify?keyword=acidosis+metabolica+causas+pdf
    • http://files.natureinwindsorcastlepark.com/uploads/1/3/0/7/130776786/bupar.pdf
    • http://siwobap.incamamas.com/uploads/1/3/0/7/130739625/47cbfab7.pdf
    • http://files.sourcepulse.com/uploads/1/3/0/8/130874284/a0be46.pdf
    • http://files.moonwillowcrystals.com/uploads/1/3/0/7/130739558/wolurumosuxomux-vamen.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/rapalixaxoxufine.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/92701594938.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/a_concise_introduction_to_pure_mathematics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3069/1496/files/bikijukewaripasimowe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/38524772621.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/kobaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/puwexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/array_reduce_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/binimodid.pdf
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/vujibofofavajilobemojus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/zasatamorek.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/texipoz.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_off00006c8c.bin
c600413532f19ef6400b94bb5f5e2cfe4c8862749ccace6e32c1f23e5488a107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8C 5332 bytes
font_01_sfnt_off00007e9a.bin
1de494c4a64ccffe98f7f82253f4056f0f1024a1d9f25cd7f7e0cff5f21e9aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9A 10040 bytes

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