Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a0b76e153ff2fe…

MALICIOUS

PDF

38.7 KB Created: 2020-08-21 09:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd1dcc069939a84482f64b1e1c99d69 SHA-1: 95b787c2acc4a71e94a69cd7fe5404aff592d3b5 SHA-256: f2a0b76e153ff2febe1e618a7626215d448651e8038ac76020e6ae3d9b586a0f
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'light reflection and refraction worksheet' and the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector.

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=light+reflection+and+refraction+worksheet
    • http://fofopojal.holisticvoicecoach.com/uploads/1/3/0/8/130874104/d29e0361554d4b0.pdf
    • http://files.darebritannia.com/uploads/1/3/1/6/131637137/rebadamijoro-renufijabotofi-fanojugabufo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/part_1910_occupational_safety_and_health_standards.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/6022671463.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/50543003136.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/nemipirakaxugi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/68967793825.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/anlage_v_steuererklrung_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/vosevad.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/60751110488.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/xerogevixotiwuxiwofo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b03.bin
5426ec0430059b8deefde6d5c670bf6bf3ed2bb8de725cf386495991cc782087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B03 5168 bytes
font_01_sfnt_off00005ca4.bin
02fc95cac6198bd7a011c0eb97fa9db7dce75fe3951ebbd28a091e43a6633635		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 10444 bytes
font_02_sfnt_off00007fc4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC4 4324 bytes

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