Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb6247508966752…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 12:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97424d60ca77ec651f7fee5d5e8e4c67 SHA-1: 7189ee42ce7677162b8ae6d0054c0199f4d55252 SHA-256: 9cb6247508966752589c1a079b91e5e787aefb0e064ef120972a9e07d97af61c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on 'cdn.shopify.com' and other domains, likely to obscure the malicious destination. The primary malicious URL is 'https://ttraff.ru/pify?keyword=employment+legislation+pdf'.

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.ru/pify?keyword=employment+legislation+pdf
    • http://files.letsgovideo.net/uploads/1/3/0/7/130739082/7620036.pdf
    • http://files.mcsljackandjill.com/uploads/1/3/0/8/130873875/xilamexekudote_rejele_tajepo.pdf
    • http://files.michiganpreventionassociation.org/uploads/1/3/0/7/130739351/cce1316013e9150.pdf
    • http://files.tyanawoodsphotography.com/uploads/1/3/0/7/130739393/6df54.pdf
    • http://files.azbluescompany.com/uploads/1/3/1/3/131384492/8242290.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/jekajatunew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/70579200864.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/71231794228.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/calcul_bielle_manivelle.pdf
    • https://cdn.shopify.com/s/files/1/0432/7931/9196/files/23875053226.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/55873085747.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/tonoxurulozof.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/mobadapoxodapoxedefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/puzogopuwalolozubulab.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/79977666010.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_off000073d3.bin
fe497a4de68d04e87a377ee136c0f7f2736275109d003520143f60d1b8126d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D3 5324 bytes
font_01_sfnt_off000085f1.bin
8428430fafbb8200d4363b91604093501426b1eb765ad1ea2b49382b1d88aec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F1 10076 bytes

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