Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f769a41778e3f46…

MALICIOUS

PDF

41.9 KB Created: 2020-08-20 09:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc2780f1f93e88278e38f5fb2315fd55 SHA-1: d681a8d9ab8b1a020c4026a299b7f41ce96a072d SHA-256: 9f769a41778e3f4677066bc3185c37ef8542efca16c00d7ecd4640084aaaf874
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm, likely designed to boost search engine rankings for specific keywords. The document body itself is largely unreadable binary data, but the presence of the malicious URL and the link farm structure strongly suggest a malicious intent, possibly for SEO poisoning or driving traffic to malicious sites.

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=green+function+wave+equation+pdf
    • http://gibokuza.neuromovefitness.com/uploads/1/3/0/8/130874474/ruzorunukoli-nelalawur-winuzilideruku.pdf
    • http://files.theabidingpractice.com/uploads/1/3/0/9/130969434/sosetiru-fuxewup-benodemufama.pdf
    • https://cdn.shopify.com/s/files/1/0430/6642/5497/files/7588886042.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/fabajixenonomulisozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/all_paper_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/88054248478.pdf
    • https://cdn.shopify.com/s/files/1/0447/9755/8941/files/cause_and_effect_essay_topics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/vokuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/11940048727.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/vabijinexa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/grundlagen_algorithmen_und_datenstrukturen.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/
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/119400

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d3.bin
e4c71cd15ad5217306bda96da72dfb77cbe61fd4376ac6dc1deefdcc25df971e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 5248 bytes
font_01_sfnt_off000078d1.bin
83c6efadf453102ab899be7de5e18c079331ebf4ced4b5cbd1797188b6040d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D1 9844 bytes

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