PDF malware analysis — malicious · d532e5c8e84b5a9b

MALICIOUS

PDF

37.3 KB Created: 2020-08-31 09:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d63eed68d4e5c5109a0fb2088b920a29 SHA-1: 61066fbf2be28b48da6e5683e5097705f9ee945d SHA-256: d532e5c8e84b5a9bbafce1fe74acfac8ce6b3f204e809d1c060da199b5f70dbe

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the malicious URL https://ttraff.cc/wix?keyword=reading+exam+level+1+esol, which is likely intended to lead the user to a malicious site. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content.

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/wix?keyword=reading+exam+level+1+esol
- https://cdn.shopify.com/s/files/1/0430/7864/7957/files/plan_braderie_de_lille_2020.pdf
- https://cdn.shopify.com/s/files/1/0433/9659/5870/files/hydraulic_accumulator_calculations.pdf
- https://cdn.shopify.com/s/files/1/0429/8414/5049/files/71605740306.pdf
- https://cdn.shopify.com/s/files/1/0439/4231/4152/files/habit_burger_grill_menu.pdf
- https://cdn.shopify.com/s/files/1/0427/5650/5756/files/gesefax.pdf
- https://cdn.shopify.com/s/files/1/0428/5077/9295/files/20674884726.pdf
- https://cdn.shopify.com/s/files/1/0431/6119/0554/files/boland_college_courses.pdf
- https://cdn.shopify.com/s/files/1/0431/5476/8021/files/72546534305.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51730359377.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004543.bin` `c728abf37b2adf8aebbd45ec986208b9d389638e7c840baa61953f40435d9850`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4543	6452 bytes
`font_01_sfnt_off00005545.bin` `0e2e6e6c0e1fa9e1c8fd2bb9b89b69764c01ceadbb58f910753bc912ccc5263a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5545	5236 bytes
`font_02_sfnt_off00006717.bin` `ebe23ad09d32aae40d2df68c4353470bbf39a93b48f06754f55fd6c84bd4a69c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6717	9836 bytes

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