PDF malware analysis — malicious · 4aa4e6cb4512ab1f

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 00:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 41ddbc281821b6af328b00f620a87712 SHA-1: a34e795f15ae6da3ba661c1cac196e5093a77b29 SHA-256: 4aa4e6cb4512ab1fe0ff45a064f2716217fc12fd4e2f9475aed88c103999f020

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=semantic+barriers+to+effective+communication+pdf, which is likely used to redirect the user to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links hosted on Shopify, suggesting a lure to download seemingly legitimate files that ultimately lead to malicious sites.

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=semantic+barriers+to+effective+communication+pdf
- http://files.plymouthopsoc.co.uk/uploads/1/3/0/9/130968996/9125441.pdf
- http://files.stephencoetzee.co.uk/uploads/1/3/1/3/131398117/31d41bf9e0107.pdf
- http://files.gclothingofficial.com/uploads/1/3/0/7/130739814/3d51dd369.pdf
- https://cdn.shopify.com/s/files/1/0429/9502/4025/files/wizipewi.pdf
- https://cdn.shopify.com/s/files/1/0430/9693/2501/files/50921155891.pdf
- https://cdn.shopify.com/s/files/1/0437/4816/3735/files/dabekusexasotulumox.pdf
- https://cdn.shopify.com/s/files/1/0431/0450/1922/files/all_amerikkkan_bada_zip.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdf
- https://cdn.shopify.com/s/files/1/0428/3197/0460/files/49537916793.pdf
- https://cdn.shopify.com/s/files/1/0429/5104/9370/files/14907967210.pdf
- https://cdn.shopify.com/s/files/1/0428/4533/9814/files/xovutikulab.pdf
- https://cdn.shopify.com/s/files/1/0430/3175/6957/files/john_deere_790_manual.pdf
- https://cdn.shopify.com/s/files/1/0430/8385/8073/files/luxefatikefunebuno.pdf
- https://cdn.shopify.com/s/files/1/0433/0638/5576/files/26390740100.pdf
- https://cdn.shopify.com/s/files/1/0432/5729/9097/files/immigration_recommendation_letter.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.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_off0000670b.bin` `e3198e143a4be74a77766fefb105e259535262d1df9cc08ca42154a420ef5ba4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x670B	5572 bytes
`font_01_sfnt_off000079de.bin` `4ba34b8c2748440871adf44a232b933974543171b57912e91f4f46818f93efef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79DE	9912 bytes

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