Malicious PDF — malware analysis report

Static analysis result for SHA-256 81af0c8eba248ca0…

MALICIOUS

PDF

63.1 KB Created: 2020-08-18 20:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae368853d7f5d5486f0dac845da0ab96 SHA-1: 6ade1870d68ee20b726bfc58a634077ab67d50f0 SHA-256: 81af0c8eba248ca0ca8f7371e9c0f56acb53e642a31a690725c8a001497142ec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links to external resources, masquerading as a document about international environmental treaties. One of the primary links directs to a known malicious redirector at 'ttraff.com', indicating a phishing or malware distribution attempt. The presence of a PDF link farm further supports the malicious intent, aiming to obscure the true destination or increase the attack surface. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=tratados+y+convenios+internacionales+ambientales+pdf
    • http://files.anthonyjgrasso.com/uploads/1/3/1/8/131871894/kikibulipizunokaxu.pdf
    • http://files.barryswoodworks.com/uploads/1/3/1/8/131856852/zegozaxes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/scientific_calculator_code_in_java_netbeans.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/nofazaripusovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/23994805915.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/65461424234.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/bitsat_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/powozutugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/tategivibasevuxero.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8890/files/92221172726.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/tsubaki_soul_eater.pdf
    • https://cdn.shopify.com/s/files/1/0447/9261/0977/files/atomic_structure_questions_answers_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/88484254555.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.

FilenameKindSourceSize
font_00_sfnt_off0000b5ec.bin
7addf39591469fe519cf3d791c0f49b43a24f1af49cf493c6f2f18a7c506cdc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EC 5552 bytes
font_01_sfnt_off0000c8bf.bin
3f906a2cdc8a0ab4175b548f0eb9eb5a7b9529ca77d8e8e2eb6c6033f26ec2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 11072 bytes

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