Malicious PDF — malware analysis report

Static analysis result for SHA-256 252bfb19d1c7798d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 02:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c234dd235911f3f493e22cfaf28a3c SHA-1: 5e72d0ee0abce6af1e7635be27029b42d89e8595 SHA-256: 252bfb19d1c7798dbe90f243a09fbfb740f165e75378cfefc6085c04a2f1dced
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Synecdoche definition and examples pdf' and a URL that appears to be part of the redirection chain. This suggests a social engineering attempt to direct users to malicious content.

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=synecdoche+definition+and+examples+pdf
    • http://files.tauntonpathways.org/uploads/1/3/1/3/131381006/sijuzetera.pdf
    • http://files.dreaddecks.com/uploads/1/3/2/6/132682745/9248415.pdf
    • http://files.rirvinphotography.com/uploads/1/3/1/6/131637224/1eb5188d3028c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/kosuwafeloteja.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/jokewetoloridomuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/4455/9258/files/76606287545.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/86306587113.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1296/files/complex_numbers_for_iit_jee.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/ssat_analogies_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/sternal_puncture.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/34180261135.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/battery_ignition_system_working.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/3627983412.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/cat_ascii_art.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_off00006aae.bin
37d97941c44d96d50a2ce704f3dfe87a5cc41542389d00efce25120c057f4008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 5572 bytes
font_01_sfnt_off00007d81.bin
85076a1d6b310178e2f50e3248eeec4ba58e29ebf76c27d2d7d4ebaea3467a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D81 10240 bytes

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