Malicious PDF — malware analysis report

Static analysis result for SHA-256 e238d3f62e14da7d…

MALICIOUS

PDF

52.5 KB Created: 2020-08-31 20:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a9cef8f71640772adb4f0403b61849a SHA-1: df3c0629d09429edc5ab40b462d642d1d032937b SHA-256: e238d3f62e14da7d353ebcb3c45dd025b546c6d820eea5d29737a9c3de75709f
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, ttraff.cc, is identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect the user 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/wix?keyword=gwent+cards+guide+witcher+3
    • https://cdn.shopify.com/s/files/1/0447/9139/8561/files/mcquarrie_general_chemistry_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/lexical_analysis_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/josijozibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/ritobokuraxifexumenajubej.pdf
    • https://static.usrfiles.com/ugd/9904c2_18cfcf52e56447ddabfba9143f87a873.pdf
    • https://static.usrfiles.com/ugd/c0b427_9dc92e768c284c80a5a66c0d35f63ef3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad56bf27fbdd4f50aa7d76d2fb30a763.pdf
    • https://static.usrfiles.com/ugd/271e65_8fe62911655644a78ffe56f7b677fd21.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7815/files/aqeedah_tahawiyyah_arabic_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2076/files/the_cask_of_amontillado_holt_mcdougal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/xofedaxujigarana.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/74813555012.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/89243134025.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_off00008fcd.bin
7815e6f73e51ebf44e3cd160eb09c567d0c8a89627ec4de18179557512ac6e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCD 5456 bytes
font_01_sfnt_off0000a26b.bin
ee17229f021809654f1ba38ffc3efa79e716ee9037c8535884eb4e9a88c103e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA26B 10144 bytes

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