PDF malware analysis — malicious · e3a40c3da16eb4ee

MALICIOUS

PDF

76.4 KB Created: 2020-08-08 21:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9ca6712c83017bea13e900396160cdbd SHA-1: f46577f319755bbf92b439681ebabf0384f4d352 SHA-256: e3a40c3da16eb4eecea9fe11f911c99969f5f22a4e81c68a7d13055d55ae25d5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about psychological characteristics of older adults. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive document title and a malicious link.

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.cc/pify?keyword=caracteristicas+psicologicas+del+adulto+mayor+pdf
- http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
- http://files.phonekeysystems.es/uploads/1/3/1/8/131871814/fejinelefeviz.pdf
- http://files.coorsdentists.org/uploads/1/3/0/7/130775556/946a865834fc9e.pdf
- https://cdn.shopify.com/s/files/1/0435/3854/6840/files/nidegekeninegopivigetid.pdf
- https://cdn.shopify.com/s/files/1/0435/6007/5427/files/58942138051.pdf
- https://cdn.shopify.com/s/files/1/0435/2252/3288/files/79332496073.pdf
- https://cdn.shopify.com/s/files/1/0431/3199/4280/files/95093910750.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wotedosepano.pdf
- https://cdn.shopify.com/s/files/1/0435/9172/9309/files/autism_spectrum_disorders.pdf
- https://cdn.shopify.com/s/files/1/0437/9174/5175/files/entrepreneurial_orientation_and_business_performance.pdf
- https://cdn.shopify.com/s/files/1/0433/5930/5880/files/12903865437.pdf
- https://cdn.shopify.com/s/files/1/0432/0677/0843/files/lobotomy_corporation_ordeals.pdf
- https://cdn.shopify.com/s/files/1/0430/9427/8293/files/73259236814.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
- https://cdn.shopify.com/s/files/1/0432/4383/1464/files/66737571435.pdf
- https://cdn.shopify.com/s/files/1/0431/4749/3536/files/xedosoferinoj.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb6c.bin` `9fd9e04627b4d9b77b664910c07c1f463255bc9718eb07cca06638f5e6b4201f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB6C	5484 bytes
`font_01_sfnt_off0000fdff.bin` `f45b2729e18b91a9dad475f282f1f913926afd27aa2c2c62f1db4d26541e2d96`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDFF	11232 bytes

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