PDF malware analysis — malicious · c81c7ac6ef8ede3e

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 05:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b92c7986192c7176ada741949d3c4666 SHA-1: 4d3ff44b9718f96233ea6e3ea9b3ddae4873ff9f SHA-256: c81c7ac6ef8ede3e960cb3815b0de3c30fbba6d586496b2e15732a2cd97baf29

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=resumes+for+housekeeper'. Additionally, it exhibits a PDF link farm, with numerous links hosted on cdn.shopify.com and other domains, suggesting an attempt to distribute malicious content or engage in SEO abuse for phishing. The document body, though heavily obfuscated, contains text related to 'Resumes for housekeeper' and the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=resumes+for+housekeeper
- http://files.adrianlobo.net/uploads/1/3/0/8/130813934/9333646.pdf
- http://files.actingcoachlasvegas.com/uploads/1/3/2/6/132681566/lejele.pdf
- http://files.artshotz.com/uploads/1/3/0/7/130739177/697adf95773b.pdf
- http://files.teamschusterindy.com/uploads/1/3/0/7/130775649/fepidizolamo-sapewezasi-nebirum-subobuwamizev.pdf
- http://files.pharmaciecocagne.ca/uploads/1/3/1/4/131455158/8ee8b481a52b.pdf
- https://cdn.shopify.com/s/files/1/0431/7813/1611/files/reruxelinafifapinimera.pdf
- https://cdn.shopify.com/s/files/1/0435/1862/3896/files/19367543076.pdf
- https://cdn.shopify.com/s/files/1/0427/6980/9564/files/2566488098.pdf
- https://cdn.shopify.com/s/files/1/0435/8022/7747/files/29307210006.pdf
- https://cdn.shopify.com/s/files/1/0441/3220/4696/files/68457924544.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdf
- https://cdn.shopify.com/s/files/1/0434/5430/0327/files/19409852532.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
- https://cdn.shopify.com/s/files/1/0427/7652/7014/files/gesuwe.pdf
- https://cdn.shopify.com/s/files/1/0431/0482/9602/files/41122331260.pdf
- https://cdn.shopify.com/s/files/1/0429/7677/2250/files/26440115468.pdf
- https://cdn.shopify.com/s/files/1/0437/7234/6526/files/zufalef.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_off0000681b.bin` `f7a8ec47e51a6e4be57a51a6ada65a133ab79e62cda99385395670cf9ae8e440`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x681B	4968 bytes
`font_01_sfnt_off000078dd.bin` `60cc55bd8c011c810bb2905264ccefc1cad2807ffae93fdb6c7087da15eb3e36`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78DD	9996 bytes

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