PDF malware analysis — malicious · b84bf97b588a3bbc

MALICIOUS

PDF

112.8 KB Created: 2020-08-02 06:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ad5071e3de0d941b5dbaf4c40a5eebef SHA-1: 3adab4f3f48f3e13f1ba19627fbef10a6a60e1cb SHA-256: b84bf97b588a3bbc903f40b369e62d1ccd615095e3dbfbf979ca4a97e22a0e16

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=audio+to+midi'. This indicates a phishing attempt designed to redirect users to malicious infrastructure. The document also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this 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.cc/pify?keyword=audio+to+midi
- http://files.prrecycles.org/uploads/1/3/1/4/131438676/2961901.pdf
- http://files.babaylantreasures.com/uploads/1/3/0/7/130738513/norim-sefexobutagizas-puwejini-xomunejovuriv.pdf
- http://files.eastafricanscholarsfund.org/uploads/1/3/0/7/130776718/vemofuva.pdf
- https://cdn.shopify.com/s/files/1/0434/0976/8600/files/renitejovafuruf.pdf
- https://cdn.shopify.com/s/files/1/0440/5025/1941/files/toduwepepadutefefozoturuk.pdf
- https://cdn.shopify.com/s/files/1/0432/3953/8851/files/tumadadapelefaxi.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/magobusiriwolozun.pdf
- https://cdn.shopify.com/s/files/1/0433/8004/8023/files/59478232668.pdf
- https://cdn.shopify.com/s/files/1/0429/8548/8543/files/wutegazadujewuzegevituwo.pdf
- https://cdn.shopify.com/s/files/1/0434/5580/7640/files/tenivanuropovozali.pdf
- https://cdn.shopify.com/s/files/1/0434/3965/3030/files/los_4_acuerdos.pdf
- https://cdn.shopify.com/s/files/1/0434/7474/7558/files/nozonurizeb.pdf
- https://cdn.shopify.com/s/files/1/0430/7465/0261/files/61538779097.pdf
- https://cdn.shopify.com/s/files/1/0429/9181/2771/files/repovokikivaru.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.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_off00017f23.bin` `450c080c37c4786062018c156a536d06829e65fa1d982d4058d9530f860c3e1d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17F23	4444 bytes
`font_01_sfnt_off00018e30.bin` `ad88f822cf478fd2467dab88a51a2cb7d4ccf564d616126b38970f5cbfe0801b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18E30	12100 bytes

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