PDF malware analysis — malicious · 24324f7de3742815

MALICIOUS

PDF

53.2 KB Created: 2020-08-02 08:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a1b2500cbd9e34dbed0546997108c563 SHA-1: 6189a56378c306945c8bddd1f40899582c3020a0 SHA-256: 24324f7de37428156bb463298b36da57dbd90c4322953e3bfefdeff9ca29b60f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=valid+addresses+in+usa'. This URL is presented within the document body, disguised as information about 'valid addresses in usa'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive 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=valid+addresses+in+usa
- http://files.charlesherndon.com/uploads/1/3/1/0/131070356/ae32acd15.pdf
- http://files.fhicks25.com/uploads/1/3/1/8/131871849/kubirofirevuduvozuba.pdf
- http://files.kontagious.net/uploads/1/3/1/3/131381612/faxalu-taxexosu-jikobusone-lupaxuxewa.pdf
- http://files.hfnyourvoice.uk/uploads/1/3/1/4/131482864/4828027.pdf
- http://files.symmetry-careers.com/uploads/1/3/1/3/131383283/nuvaxojotujejaxusi.pdf
- https://cdn.shopify.com/s/files/1/0433/5799/5160/files/65209522269.pdf
- https://cdn.shopify.com/s/files/1/0430/9748/9572/files/98193039583.pdf
- https://cdn.shopify.com/s/files/1/0433/0058/5636/files/97280873948.pdf
- https://cdn.shopify.com/s/files/1/0427/5827/5238/files/zalilusirebokim.pdf
- https://cdn.shopify.com/s/files/1/0431/6656/4507/files/ramijaxidara.pdf
- https://cdn.shopify.com/s/files/1/0430/5344/9367/files/20081756148.pdf
- https://cdn.shopify.com/s/files/1/0430/1576/6177/files/62551488737.pdf
- https://cdn.shopify.com/s/files/1/0431/5676/6882/files/32104525022.pdf
- https://cdn.shopify.com/s/files/1/0427/7318/4678/files/57923908619.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/risekumomivedopela.pdf
- https://cdn.shopify.com/s/files/1/0427/7387/2807/files/fofolosis.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_off000086b6.bin` `dd28eea77242585669c8bd79136e8f439f401d2ba78cd18bf458e6572d6d77c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86B6	4784 bytes
`font_01_sfnt_off00009701.bin` `823d1944bea1fae3461038e48df06fbd75c3cdbadb50f636b85e6d4e16b51795`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9701	16068 bytes

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