Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb64c4154d4bb9e…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 06:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a64fed65c327598e652f5c6059540464 SHA-1: dfb6a9ea90f6845c6d5962cee59919912f764e04 SHA-256: dfb64c4154d4bb9e3a63a5a82fca604e6262e53891cf71153a8698572c3e6938
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector. The document body contains obfuscated text and a URL that appears to be part of the redirection chain.

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.com/wix?keyword=the+rocker+2008+online+cz
    • https://static.usrfiles.com/ugd/c3f88d_00283a3087a446b38380fe2b3287f702.pdf
    • https://static.usrfiles.com/ugd/3e9e83_99d26682d3254da694da57013a95f706.pdf
    • https://static.usrfiles.com/ugd/b8c837_116f9e7c5bb14586972edbc3ed1e0a6a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_ea9e31150b6e440ca45226678ac1c8a6.pdf
    • https://static.usrfiles.com/ugd/b4a829_0a7fb07a17fd49b19063ea92b0c6ebcc.pdf
    • https://static.usrfiles.com/ugd/d1c05f_34fd0b2f81b646ecbd5a27849511cfe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdf
    • https://static.usrfiles.com/ugd/38bf1f_6220910946144ba7b88c6f7cb382cb4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a30388abdfd24672a16a5c465e37949b.pdf
    • https://static.usrfiles.com/ugd/73cb9e_f3bb0d22b2964f49b9529f793325818c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/dumadapix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5292/files/mibanufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/69964424911.pdf
    • https://cdn.shopify.com/s/files/1/0429/2549/0332/files/96031684772.pdf
    • https://cdn.shopify.com/s/files/1/0466/3826/8581/files/widurufadanedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/38582798233.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_off0000683d.bin
a18550c8c0043e22e36f6c6bbd9ab09a42c636c57cf9e188d1406597dd1901e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683D 5028 bytes
font_01_sfnt_off0000795e.bin
62865af2341bf78f286813bc8282df113c5f6dc8471c2349a3e2d78af0e62ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 10768 bytes

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