Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cefaff8600f3a6d…

MALICIOUS

PDF

44.7 KB Created: 2020-07-27 14:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdbb213cbb3a7815c6acdc0a7c3fec3a SHA-1: a1f7bf7a19c646e427fbbb34ec7978a244b83b75 SHA-256: 5cefaff8600f3a6df655109de67f3eb7fecb33311e1846b6e89d0824b272a714
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, a common tactic for SEO poisoning or distributing further malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=adobe+reader+standalone++windows+10', is identified as a malicious redirector. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and linked content indicate a malicious intent to redirect users to potentially harmful resources.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=adobe+reader+standalone++windows+10
    • http://files.angeladaley.com/uploads/1/3/2/8/132814241/zupej.pdf
    • http://files.elephanttracks.net/uploads/1/3/0/7/130739369/bukulajuxi_zixovonali_fuseno_vabebokel.pdf
    • http://files.doubletroubletraining.com/uploads/1/3/2/8/132815050/5a0d6b170.pdf
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.pdf
    • http://files.stirring-embers.com/uploads/1/3/2/8/132815175/xopupagonefase-porilagowosi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/kupibekonevamokako.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/46306138715.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/nepunavutiwuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/38566164359.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/99258924153.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/69725109147.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/serejokiveripajit.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/ranif.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/badugisupewuvekedope.pdf
    • https://cdn.shopify.com/s/files/1/0430/5325/2757/files/zusizulovutopasagokujo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/63110907431.pdf
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/sosorudumorokexorazegux.pdf
    • https://cdn.shopify.com/s/files/1/0438/2359/5677/files/13057334557.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_off00007119.bin
37d7e4a35d87e40a2733f3471781d0d20c78d63311fcfe7286045cc3a93c2c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 5020 bytes
font_01_sfnt_off0000823f.bin
42844205703b13cf4b9217eef502422327fd388ad691bd7851ffcfd4e622f3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823F 10420 bytes

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