Malicious PDF — malware analysis report

Static analysis result for SHA-256 8966b31a51899592…

MALICIOUS

PDF

106.0 KB Created: 2020-08-29 22:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00aa3d508b0b4c339860c7f5d8dbec31 SHA-1: c9e2a4ed78702cd8483957dd9b96b72808abc5c1 SHA-256: 8966b31a5189959208aa35ed14ab44e0f5577253545b611cd7e8a3b985a6e95b
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document title. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier also flagged the document as malicious. The embedded URL leads to a redirector that likely serves further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=manual+de+gerenciamento+de+crises+da+pol%25C3%25ADcia+federal
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/treated_wood_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/vewisivibizewib.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/tirudavebatowukijisariwaz.pdf
    • https://static.usrfiles.com/ugd/60933b_a0066a7bea94445f98695732e20443ae.pdf
    • https://static.usrfiles.com/ugd/93c935_4ba3c513a1444fc783c228472aa8ceca.pdf
    • https://static.usrfiles.com/ugd/c3f88d_f006d7c990514f998ba7d62c32d0d575.pdf
    • https://static.usrfiles.com/ugd/b8c837_f998caf58f444d5c9ba04198824a294b.pdf
    • https://static.usrfiles.com/ugd/5be868_fda4f89580524f67b1f012e730b3951d.pdf
    • https://static.usrfiles.com/ugd/02beb7_98ae32f7aa994ffcb09ad9d4e24eb86e.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_off00015d69.bin
ad7d2ba63c409ff4693bc650d763f21b2ce1f4d8efe488b1c01a81e8acee1ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D69 5532 bytes
font_01_sfnt_off00017029.bin
6ec177b25c2269cc2801ee876c503709dfd692816aab19f5b4ea82069cdfafb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17029 13532 bytes

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