Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb1755d177a7ca8…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 11:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c8edfe9a9fcb1470128cf47263b8b16 SHA-1: afb87dfde11b756b9a429800f8cc7dda354ad4a3 SHA-256: 3cb1755d177a7ca88fb1c78101e26e1f07e244e8e185ee45fa348512e0d4f01a
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=cardiopatia+congenita+neonatal+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme. The primary attack pattern involves luring the user to click the malicious link, likely leading to further compromise.

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/pify?keyword=cardiopatia+congenita+neonatal+pdf
    • http://files.kavachikavachi.com/uploads/1/3/0/7/130740130/nadewupo_tabisanadejugal_tukuxov_kapagakugisez.pdf
    • http://files.silverrescue.org/uploads/1/3/1/3/131398334/likiremegemop.pdf
    • http://files.mojoecafe.net/uploads/1/3/1/8/131872273/d6040ac4dcf2.pdf
    • http://files.trinityjamestown.com/uploads/1/3/2/6/132681602/375267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/zunosigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/64652541813.pdf
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/netuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/72450789096.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/tasogaxebafumijipoje.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/wutuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/22552987853.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/bevakebuguzeparijumu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/29918298600.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/breeding_rabbits.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_off00006268.bin
6a0919d5d24501835fafc8839f2d54a73157981d4958a481e54579c52d1aff7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6268 5048 bytes
font_01_sfnt_off000073a6.bin
5ffdc57c4aa5e0a81548adfe9be6577644c127f35bd0ddd1eb4b98fc6903378b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A6 9904 bytes

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