PDF malware analysis — malicious · 890d551f1604dba0

MALICIOUS

PDF

44.0 KB Created: 2020-07-27 16:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2a06a3c73997f44e11ad11c77da590d5 SHA-1: 075dba5ae1f7edb2211f9dc3644ba8e0181c20e9 SHA-256: 890d551f1604dba0ea640b176a7937701d476b05f1595b6472aa75e03328ebd3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, appears to be a lure related to 'retail assessment test questions'. The presence of a PDF link farm and a malicious redirector suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=retail+assessment+test+questions+and+answers+walmart
- http://files.blacksmithcraft.com/uploads/1/3/1/6/131606815/jigosunibalo.pdf
- http://files.mayswebsite.com/uploads/1/3/2/6/132682471/7646649.pdf
- http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdf
- https://cdn.shopify.com/s/files/1/0432/0965/4432/files/bukokujusilurifiburagovo.pdf
- https://cdn.shopify.com/s/files/1/0432/3213/3278/files/93591506733.pdf
- https://cdn.shopify.com/s/files/1/0433/5216/2462/files/17372336443.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
- https://cdn.shopify.com/s/files/1/0427/8714/3839/files/68879607036.pdf
- https://cdn.shopify.com/s/files/1/0431/1177/6416/files/dedakasobudilawo.pdf
- https://cdn.shopify.com/s/files/1/0440/5723/1525/files/30261053675.pdf
- https://cdn.shopify.com/s/files/1/0431/8917/4432/files/91858623004.pdf
- https://cdn.shopify.com/s/files/1/0435/3510/6207/files/woduduromokexatatomes.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/
- https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006fc1.bin` `cb1a6af8b7d1d137f4503116856a3974636d72229fa3d20adf36bbd7acb5d14e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FC1	5076 bytes
`font_01_sfnt_off000080ee.bin` `5964f112734cfcc3720fe62ee8be3919a9ca8696f635e7f04ff00747e6919b25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x80EE	10040 bytes

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