Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59797fe908fbc4d…

MALICIOUS

PDF

106.0 KB Created: 2020-08-09 13:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a58cdb93b31808910845facd05fa98 SHA-1: 260b7d580c6957f8d66cf55bf33a1654dc8d1804 SHA-256: c59797fe908fbc4dfcfa857bb7b7299aa6b6d1b389e07edce0819d64df9b3e41
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is ttraff.ru, which is used in conjunction with keywords suggesting a lure for search engine optimization. No scripts were extracted, but the sheer volume of links and the malicious redirector indicate a likely phishing or malware distribution attempt.

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.ru/pify?keyword=enciclopedia+britannica+espa%25C3%25B1ol+pdf
    • http://files.brasserielouloudi.com/uploads/1/3/1/4/131437474/2096263.pdf
    • http://files.classicalmusictoday.net/uploads/1/3/2/3/132303382/xobaxezudawatovotaze.pdf
    • http://files.apicgno.org/uploads/1/3/1/4/131453902/6561216.pdf
    • https://cdn.shopify.com/s/files/1/0436/6319/6310/files/53407227694.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/ramadan_calendar_2020_lahore_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7991/7987/files/bikini_body_guide_workout_exercise_and_training_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/vincent_chet_atkins.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/49170245751.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/pufonix.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/classroom_language_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/15107953911.pdf
    • https://cdn.shopify.com/s/files/1/0431/5198/2754/files/zulirokumejeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/epidemiology_and_biostatistics_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.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_off00015b5d.bin
ed1daf837de5ec95c30e72795827266c73e70f973801b62a1578042ee957353a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5D 5460 bytes
font_01_sfnt_off00016db1.bin
5b4b0e0ed9f659778e465e8f680e86d01a43d731a8a9edcf1529567a6dd9a9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB1 13140 bytes

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