Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0210926583c14ca…

MALICIOUS

PDF

40.2 KB Created: 2020-09-17 05:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037da4debe87674b1981d8ae7179a48e SHA-1: 05c5671f7ddb520b3201d739d6a9d26d2d01e037 SHA-256: d0210926583c14caa34f0950e7b6a3800d174070d3b3e7aa2c5dde36ea70f525
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a worksheet answer key. The ML classifier strongly indicated maliciousness, and the PDF was flagged for containing a link farm pointing to numerous external PDFs. The primary malicious IOC is the redirector URL: https://ttraff.com/wix?keyword=practice+labeling+the+cell+worksheet+answers.

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.com/wix?keyword=practice+labeling+the+cell+worksheet+answers
    • https://4b674f69-8d4e-4e92-aa7d-fb09f8a8aa8d.filesusr.com/ugd/54e393_ff3a8016e7b14c6e92c9bd01ea063d97.pdf?index=true
    • https://cb98a6e7-2b4d-41a7-94dc-7765a000ad79.filesusr.com/ugd/3e7897_af00e78bcdfc47b9ab221be8c64ce0da.pdf?index=true
    • https://df3564d8-b28a-4be3-accb-497fae65363d.filesusr.com/ugd/7a359d_6d0568fe48054a3bbfed841c87cad7a0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0460/7423/2996/files/udemy_course_er_win._exe.pdf
    • https://a910ab65-3846-4db8-af55-5dd87e1ee481.filesusr.com/ugd/1e4819_2bca2f043b8f40859dadf39aaebfaf14.pdf?index=true
    • https://337bc49b-2d45-4a04-9691-7ba16c355624.filesusr.com/ugd/f515ca_93798f83f8b1401ab389f49fc3716613.pdf?index=true
    • https://24ac7bda-d1f2-434a-80c0-ca21cf728636.filesusr.com/ugd/bba345_e41ea0bfa1cd41558b423488ab78d44b.pdf?index=true
    • https://139f9472-6f67-49dc-9cad-2e9cb8cc91a2.filesusr.com/ugd/83e584_edeb4a0f1b994eb1a8c66b6498c19942.pdf?index=true
    • https://f0ca9efe-1821-45d5-80a8-40dfe273b849.filesusr.com/ugd/2eedf1_c198375d873c40eb812bc6f13c3de2a5.pdf?index=true
    • https://179f5fd7-915e-4e84-9bce-76b46a8d2dd3.filesusr.com/ugd/843280_142a5380d30f404aa209c17eb34b502a.pdf?index=true
    • 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.

FilenameKindSourceSize
font_00_sfnt_off00005e52.bin
2813b98e2847bbd50199e666ae2deeac86993f440b2d1e8a926861c6c533c357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5360 bytes
font_01_sfnt_off00007095.bin
e92951928c1f6afc8458939403dfc746c10ba063859b435d8e2e10db6d2d2234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 10412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.