Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d90695ea3b82173…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 15:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c28a8da9f9c76b8bb9e3099f99d8206a SHA-1: 6075d2072ef8e33dc5ac353a9f6e54e13877cde5 SHA-256: 2d90695ea3b821737dc187e10507bac9d56b472274a7fd13e8949cf48f43764d
150 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded links suggest a lure related to installing surveillance cameras, which is likely a pretext to encourage clicking the malicious URL. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL, which likely leads to further 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=comment+installer+une+cam%25C3%25A9ra+ip+de+surveillance+pdf
    • http://files.numeracyshed.com/uploads/1/3/0/8/130874588/dokubadumubaluf.pdf
    • http://files.intoschool.org/uploads/1/3/1/4/131483143/tumidovabar.pdf
    • http://nigovejax.kalyango.com/uploads/1/3/2/6/132696414/doxomaz_gegirewegimax.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/40383350384.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/60614938679.pdf
    • https://cdn.shopify.com/s/files/1/0440/6303/1448/files/5718108289.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/mitaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/7090108499.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/29474817968.pdf
    • https://cdn.shopify.com/s/files/1/0434/5059/7528/files/11099321198.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/susugizovarobusokatoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4327/files/93659584194.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/20579376562.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_off000069aa.bin
95b8830a1321ab8227e0e0f61c73e6d7ca7f7d6c0c8890a9c7fc6e099ccc5fc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 5408 bytes
font_01_sfnt_off00007bb4.bin
ff1ca6b78d2a289055946094dd8a5315247d70abfba2b2694bc1a34140e3bda4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 11968 bytes

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