Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b93997a729f19e…

MALICIOUS

PDF

32.9 KB Created: 2020-09-02 07:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b173916641f93029c94d64422fd8ab SHA-1: 648c9bf71f6c93d30578c5f0e348e56cfcc196d3 SHA-256: 50b93997a729f19ef9539657c90989f39711fdc5891f06ee52069ef9c47169e4
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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/wix?keyword=great+ampong+mix+songs
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/anunnaki_vs_reptilian.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4411/files/lejuwesubeva.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/bedigixulabuwosige.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/sap_bods_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0465/3491/8302/files/army_letter_of_commendation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/34105887404.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/23501045672.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/94856880503.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/carrier_weathermaker_9200_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/hp_photosmart_2610.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_off0000442d.bin
79e093f09362a3111e4d6fdbcb7e8e6612c8c10f64844aede4494809bd6f3cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x442D 5204 bytes
font_01_sfnt_off000055d2.bin
a7c1d51f114c5ffd9088ed5070ab1cd6640e7ef66b11c5e453d12b45f7d858a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D2 9788 bytes

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