Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b95114d7528ccc…

MALICIOUS

PDF

47.2 KB Created: 2020-09-06 10:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 38f9e52aa1560885c57caa28ded480c4 SHA-1: 32fdc80a127a5f4ccdde08389dd9deb31e8eda08 SHA-256: 53b95114d7528cccedb0820afef3432706126090ebfc2d698ca4a28b61b7c567
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a redirector URL, which is a common tactic for phishing or malware distribution. The document body and embedded links suggest an attempt to exploit SEO keywords to attract victims. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a redirector, supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=mandated+reporting+laws+illinois In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/15644379867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/3011724097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/83586533040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/systematic_and_unsystematic_risk.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4a001_e9df8f615648403f94c8ba822d91a93e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ebc5f9_4f21c2dcdd684f08b9888f009b345580.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_34b02d0c5ac14e1b926a97b06f3c3300.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/35dc59_89212b1bcd93453e814a630f0302c1d0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7d1dc9_098375fb5bfe4cb79f3a20dc7e0a6ff1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83e24f_16e00b29db3c4eada36c00ced59c3620.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/accd1f_7611eada62654806894439a38a194ae8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c79b1c_6665abdeae124038b26e80cd98ef6814.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000799c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 5224 bytes
SHA-256: b44722cc29dc48199f1ea510f30fba14cc0c22565f3a1fc6a9e4ff64e56f9f2b
font_01_sfnt_off00008b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 10748 bytes
SHA-256: 385e8acb7c3a2b7757d519dcff2ac617a11ed06fcfc7312794f60b1c0008d8af

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