Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7dd423bf90a533d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 14:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66457b17c9459ee4b22a8773b366e83e SHA-1: 680c50b5860584be17949f6b79d7159b0fc9e97d SHA-256: a7dd423bf90a533db59fff9ac9cff79049c4bf4b62cf57fadab65b030050b9fc
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests the document's primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing.

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=stative+and+action+verbs+list+pdf
    • http://files.myfaithonfire.com/uploads/1/3/1/6/131637309/64794.pdf
    • http://jufusexab.elilanguagemagazines.com/uploads/1/3/1/0/131070767/nujadotoramul.pdf
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.pdf
    • http://files.smithsstationruritan.com/uploads/1/3/0/7/130739308/mirawux.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/tugofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/bibatudopegumufupavas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/mutawowosisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/13289316672.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/52688346201.pdf
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/5908657189.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/61723846441.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/gapusafi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/novoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.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_off000060f0.bin
72904d541fd3ce34f9c8e971cd0d7174969145bc6efbe7212b4790cb9e593957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 5452 bytes
font_01_sfnt_off00007387.bin
3d9eb46b448dc8b9792cd4ef2b0457e4f4f534d385e06f8299f56878e7f9a086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10052 bytes

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