Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcc0707834975cf…

MALICIOUS

PDF

48.4 KB Created: 2020-08-24 13:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 988e9b5e8ee55a95eb16a1e746ae2b14 SHA-1: 6a2210cb0f01315d09529c7131c4e4adad93696b SHA-256: dfcc0707834975cf1e6efaea0d7dbbb7fa6d0b1c6ef67e781180e7e450002aa5
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 heavily obfuscated, contains text that appears to be a lure related to 'asco cap her2 guidelines 2013'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly indicates malicious intent, likely to redirect the user to a phishing or malware distribution site. The ML classifier also flagged this PDF with high confidence.

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=asco+cap+her2+guidelines+2013
    • http://files.queensvisionafricanapparel.com/uploads/1/3/1/0/131070420/82ccbb8a.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/coordinating_and_subordinating_conjunctions_worksheet_year_6.pdf
    • https://cdn.shopify.com/s/files/1/0456/9900/6620/files/39697996350.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/79433813776.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/11076046897.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6839/files/antas_ng_wika_pormal_at_impormal_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/child_apperception_test_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/relajepuzuwenimewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/38291103069.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_off00007eca.bin
4450ec48f1fb44d29885fed86e90b6acd23c77b535fece5f21bd24b4e0cc1f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 5812 bytes
font_01_sfnt_off00009290.bin
6774c0dd1b0c1198e53e58220ba9debe32efb5abb9de1ba259c98e2571094bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 10284 bytes

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