Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb68f942a0c35f00…

MALICIOUS

PDF

57.2 KB Created: 2020-10-24 16:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324d4d57fae2f5adbd7939c5c7662d92 SHA-1: 9e920d97da1a74b54286bdf851815e88bb3664a6 SHA-256: eb68f942a0c35f00dec025932b2b79d522675d10c12005f526bd4081ae1847a6
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a known malicious domain, likely intended to trick the user into clicking it. The ML classifier strongly flagged this PDF as malicious, and the heuristic confirms it's a redirector link. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=far+cry+3+new+game+plus
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5f93edde94103.pdf
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8740c27ae89.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f8afe3be747a.pdf
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f941c18c3b45.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f8ee3f7482c4.pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f91e57b6ff74.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9126da766c1.pdf
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f87579fc2270.pdf
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5f9386784a2c9.pdf
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f886a8e5d01d.pdf
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8a9d8736639.pdf
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f916502d40ff.pdf
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f91514527f8b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/varoximu/access_bars_guide.pdf
    • https://s3.amazonaws.com/tejuvonixag/bible_in_english_free_download.pdf
    • https://s3.amazonaws.com/gupuso/40058763729.pdf
    • https://s3.amazonaws.com/mubemutolewe/xufoxufobuzumakek.pdf
    • https://uploads.strikinglycdn.com/files/e953b9eb-f702-4187-8bb3-cdd121fb0649/zakotinepu.pdf
    • https://uploads.strikinglycdn.com/files/50dcb179-3848-4e81-8b35-2433a3d0b321/sap_crystal_reports_2016_product_key.pdf
    • https://uploads.strikinglycdn.com/files/27dd1021-003f-4239-82f2-c762dcafcae1/81765354218.pdf
    • https://uploads.strikinglycdn.com/files/4be3f35c-26bb-4bdf-9266-2d13bf05da34/suzorisidime.pdf
    • https://uploads.strikinglycdn.com/files/6fb03087-4de1-4ff9-941f-810c163acb96/90825155258.pdf
    • https://uploads.strikinglycdn.com/files/843f5702-b87c-4cd2-9f81-8a3d04c9db1c/bebizavapubiledafozixaxe.pdf
    • https://uploads.strikinglycdn.com/files/7a7838a4-8f1f-4ac3-946d-1e963e143a92/5342553654.pdf
    • https://uploads.strikinglycdn.com/files/6edaea3e-286d-40eb-b66b-56771d6dae33/38494756000.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_off00009de9.bin
883990aa27f11cd77d423ef248f80dd3ff69c52cd7bca98bdf30d802af1d04b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE9 5564 bytes
font_01_sfnt_off0000b0e5.bin
7fa452d8bc6929144ef88e26f84f143f8135ccf2d97456708b8f348fc9235757		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E5 10852 bytes

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