Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fe97365cfe8976…

MALICIOUS

PDF

59.0 KB Created: 2020-07-09 05:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7b5ddd44bec86f6c0d94a509afceb3a SHA-1: f6f40d8d85317fd221da077e04ca77969b36ca96 SHA-256: 61fe97365cfe897682596060224b77c414a3b00184ba8abbbc0e8449d9a0c812
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to SEO-spam PDF hosting sites. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/wb?keyword=national%20geographic%20magazine%20arabic%20pdf, suggesting an attempt to direct users to malicious content. The ML classifier also 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.cc/wb?keyword=national%20geographic%20magazine%20arabic%20pdf
    • http://files.janetfergusonauthor.com/uploads/1/3/2/7/132740256/9304291.pdf
    • http://files.maxiesknitwear.com/uploads/1/3/0/7/130775268/1215208.pdf
    • http://files.stjohnshighlegh.org/uploads/1/3/1/3/131398046/netamelo_viwalalu_pawub_pabaru.pdf
    • http://files.homeschoolclick.com/uploads/1/3/2/6/132681264/waniriwejafeg.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdf
    • http://files.ptegppa.org/uploads/1/3/1/4/131454581/jefuved_falowejijozipan_jururuziwutenod.pdf
    • http://files.firstresponseland.com/uploads/1/3/0/9/130969048/6938680.pdf
    • http://files.benspanbock.net/uploads/1/3/0/7/130776575/2377934.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mebanome.files.wordpress.com/2020/06/lozadovojixomix.pdf
    • https://wisalamom.files.wordpress.com/2020/07/10503322407.pdf
    • https://reriwepiri.files.wordpress.com/2020/06/likuwiseximizedowon.pdf
    • https://vudofuj.files.wordpress.com/2020/06/57156429572.pdf
    • https://jexoxaluk.files.wordpress.com/2020/06/dudufasewunevu.pdf
    • https://fasukugon.files.wordpress.com/2020/06/xapojewekopovixigapuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.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_off0000a946.bin
fc377676480c3f8c3deb913febc8746929422de49f4ca3461a7d2afb72d56127		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA946 5340 bytes
font_01_sfnt_off0000bb40.bin
82c59626b9f519c611ea28b6c4ac477f3e348b23072857bb081ee33a27d934a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB40 10380 bytes

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