Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e365d9ca63687d5…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 00:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45e28647ce5562660271833f059d17c7 SHA-1: 64c990861cd68d4a8a95a39c42a1b8627eba3889 SHA-256: 5e365d9ca63687d5358635fc0774c9a9edc4c24ee539d28fa231f7d8a68f6aa2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself contains a mix of obfuscated text and URLs, including the primary malicious redirector. This suggests an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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.ru/pify?keyword=dilution+problems+worksheet%2528+m1v1%253D+m2v2+answers
    • http://files.molokaimiddleschool.com/uploads/1/3/1/4/131407406/1180927.pdf
    • http://files.utopiatravelonline.com/uploads/1/3/0/7/130775229/22f5f.pdf
    • http://files.prestigehomecare.com/uploads/1/3/2/6/132682282/b3d6fee9d337715.pdf
    • http://files.marielouisejones.com/uploads/1/3/2/6/132681452/wafine_xogopimabezis.pdf
    • http://files.misscookbook.com/uploads/1/3/1/8/131871701/2365290.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/cadwallon_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/16756305175.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/fusidoxebotajalafegisaxak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/repaduwulitewosonotuteniz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/rogezal.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/frozen_shoulder_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/pof._com_deleteaccountb._aspx.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/download_the_celestine_prophecy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/34854950282.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/vajodajemiwababazinifev.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_off000066cf.bin
71655d1b3bdae552ac84a8ab7860542022fafd3d01e8b3ad996df29791f8f17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CF 5720 bytes
font_01_sfnt_off00007a3a.bin
b3989da2043991658c3e16a8202ae0a74a59d701310fc89586290f040efb6cce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3A 14012 bytes

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