Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9644b1d1f518ba2…

MALICIOUS

PDF

65.1 KB Created: 2020-12-07 06:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2be5431c8a4878fce2bf8ca9054211f2 SHA-1: d3b32ef19e481fe8c67fc48b24072d2877936532 SHA-256: f9644b1d1f518ba2d8a6a0a572ae838dbf9ceb702e3998e9670a813c20fafc6f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=journey+learning+center+grapevine+tx'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=journey+learning+center+grapevine+tx
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f89dadb106d1.pdf
    • https://cdn-cms.f-static.net/uploads/4447649/normal_5fa0f6634334e.pdf
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5f97d06341802.pdf
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5f9b6d6a203e1.pdf
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fc313c75e441.pdf
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f90630e471be.pdf
    • https://cdn-cms.f-static.net/uploads/4474988/normal_5fbb12cac8d95.pdf
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f875fe043166.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5d5d111f6a41984a77cd7/t/5fca3b3dacaba317346960a0/1607088959069/xujajevufudibe.pdf
    • https://uploads.strikinglycdn.com/files/d7d58a0b-7220-4a5c-8c6d-ffb3cf13865a/8881317560.pdf
    • https://uploads.strikinglycdn.com/files/c181c189-e5b4-45a2-99d9-6e49e77c2361/63454494235.pdf
    • https://s3.amazonaws.com/pegebunov/wixizesavik.pdf
    • https://uploads.strikinglycdn.com/files/5b118778-09d3-41bb-91a8-5df4c298d295/54733401824.pdf
    • https://static1.squarespace.com/static/5fc5180827a199023ad07c53/t/5fc6c1153ac9c763f4c0381e/1606861077573/86138990702.pdf
    • https://s3.amazonaws.com/bejokazemur/best_point_resort_waterville.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0b0.bin
5af3d38de69d1544b79b5fbf5888732d9a19966b03b14e2fd96d71ebc4ee8635
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B0 5140 bytes
font_01_sfnt_off0000d257.bin
8f69798f98519c5db6292694683c3cfab83017b855ee63270080c17fdeda1164
pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 11176 bytes