Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32021200235aba6…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 23:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ea920c49aab573b46cd1534ce706a3 SHA-1: 78ed2c575f5c19c99d738da0ed2020e2d933ddd9 SHA-256: a32021200235aba6bf836f498559a7a1e52569de67eb3b2ad04520e5a0de1594
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, with one prominent link leading to a known malicious redirector. The document body, though partially corrupted, contains text related to 'arcade games free for windows 10' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=arcade+games+free++for+windows+10
    • http://files.dazzlinggoddess.com/uploads/1/3/1/0/131070351/4622500.pdf
    • http://files.bishopkemperschool.org/uploads/1/3/1/6/131606861/rotanogirejuzibu.pdf
    • http://files.iwanttobeanengineer.com.au/uploads/1/3/1/4/131453402/zinemuxalarokos.pdf
    • http://nikesisa.sammybeaugard.com/uploads/1/3/0/7/130739751/minut-pivis-jekezumet-topatu.pdf
    • http://zefavo.josiepassantino.com/uploads/1/3/2/6/132682646/8053386.pdf
    • https://cdn.shopify.com/s/files/1/0431/0309/2898/files/laravel_dependency_injection.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2139/files/application_of_cryopreservation.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/12916854593.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/23652785430.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/insert_watermark_in_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/cash_book_entry_in_tally.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/21673953907.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/fox_converter.pdf
    • https://cdn.shopify.com/s/files/1/0448/1590/9026/files/seven_line_prayer_to_guru_rinpoche.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/reruxusasog.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_off000067e8.bin
1d7bcac82c0842c56183549c892c8f06ed9d94af47e90ebdb0ed7c82d30e41ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 5584 bytes
font_01_sfnt_off00007adc.bin
9e6d8c5bc7afc5a1dd18b99e71e22a5683be86d940eab52c3a0a76497d432557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 9912 bytes

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