Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a4d303f33e21c4…

MALICIOUS

PDF

49.0 KB Created: 2020-10-27 03:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22f9e88a94c1421f2d01ddfe9fa17a6d SHA-1: bedbc61a2ff9a0c2c30360499bf2706cb27df24e SHA-256: 98a4d303f33e21c4e95689ddf0c57f6ec02424859e9f0f96debb33af9eed04cd
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful website. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.me/123?keyword=urban+meyer+above+the+line
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/8922978.pdf
    • https://cdn-cms.f-static.net/uploads/4382961/normal_5f8d52c61b8ad.pdf
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f93527e3edce.pdf
    • https://cdn-cms.f-static.net/uploads/4387229/normal_5f91748c96f4d.pdf
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8c53f688ffb.pdf
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f87518b4a296.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f872730c5cb8.pdf
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f8a03777fdf5.pdf
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8748a870d47.pdf
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f8dc3d590874.pdf
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5f8f2f0c6d3ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f96453bb-66e0-4070-8bc5-e82b79abe05b/kivozafigum.pdf
    • https://uploads.strikinglycdn.com/files/8efc9784-4914-4a55-9e82-d4376578fb90/40060036530.pdf
    • https://uploads.strikinglycdn.com/files/04841e9f-e854-4c4f-b6ac-9d6dcf27b05e/zuxobufagadagetonugodin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9934/0448/files/city_of_dallas_ga_zoning_map.pdf
    • https://cdn.shopify.com/s/files/1/0505/0731/7410/files/spam_email_blocker_android.pdf
    • https://cdn.shopify.com/s/files/1/0486/1358/9152/files/adapter_and_adapterview_in_android.pdf
    • https://s3.amazonaws.com/remufuzu/convert_file_sang_file_nh_online.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/turexezufedive.pdf
    • https://s3.amazonaws.com/rufonali/62998990896.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_off00007db5.bin
0913cb86dc319edb04b6045283a9f8eccc91be8cb51597c66e1dd0b366b53aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 5040 bytes
font_01_sfnt_off00008eb4.bin
3018585bd7d19a4a0f5124a81c2cdc6f303dc951dba863679bc8417324b7d0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 12064 bytes

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