Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc3548cf83c4455…

MALICIOUS

PDF

51.1 KB Created: 2020-08-03 16:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c11f6089e3f46e6dbfa31b8552343c78 SHA-1: 766cf7eaa53c953b758dcb548323b4d8ada8bfdd SHA-256: 8bc3548cf83c4455c8b9913da0abf8e9af5e4182cae9123b5cbd6a04599f9597
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking URLs hosted on Shopify, likely to appear legitimate. The primary malicious URL, https://ttraff.com/pify?keyword=polymer+biomaterials+pdf, is the most critical IOC, suggesting a 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.com/pify?keyword=polymer+biomaterials+pdf
    • http://files.paigebluejacket.com/uploads/1/3/0/7/130775275/letugekanerefan-pajawepukaki.pdf
    • http://files.fernandoandradeart.com/uploads/1/3/2/6/132681728/nuwoxapeger.pdf
    • http://files.thecubeexercisephysiology.com/uploads/1/3/1/3/131380596/ef7167ce.pdf
    • http://files.riverstonerazorbacks.com/uploads/1/3/1/3/131380181/4215656.pdf
    • http://files.hollytilley.com/uploads/1/3/0/7/130739344/4958658.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/37351866814.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25006313747.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/35548188044.pdf
    • https://cdn.shopify.com/s/files/1/0428/9308/2783/files/zaludixosexifil.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/21260343392.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/satizor.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/9318559889.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/fogawufud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/lenonurixuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/suxesaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/wofakemizimiruzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9119/files/wevejebolamezutoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/kambi_katha_malayalam_cartoon.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/65521731515.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_off000080f5.bin
0ab3a967b7fe743d87cef628cab42861e205bb4e060ed03977e682082374cc0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F5 5432 bytes
font_01_sfnt_off00009351.bin
0ebf85b4d435be71d1ecfd507ec7bb491c337047ac7a507b74b3b1e541c4f8b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9351 14400 bytes

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