Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb010ab9932ca37…

MALICIOUS

PDF

92.3 KB Created: 2020-09-18 00:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b398d9a25968775b49c763fa4b5434f SHA-1: 3bb7234e9f9530559ba0866888727f4badf6d760 SHA-256: 0eb010ab9932ca3774fbeb2ce72e0fb65a71de0e70b53d480fb82d922ab5067f
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 URL. The document body, though heavily obfuscated, contains the URL "https://ttraff.com/wb?keyword=army%20ceremonial%20and%20protocol%20manual%202014", suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=army%20ceremonial%20and%20protocol%20manual%202014
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6a1e45a5-24c2-484e-842a-ce3abed74e27.filesusr.com/ugd/1e11d0_c0558d2e6db648f481ecd71142a4738c.pdf?index=true
    • https://ae0373c0-7b8f-43d4-9750-ca0c1756ef4f.filesusr.com/ugd/afbef4_432f2e5a64fd4a3488468eff2a12d1e8.pdf?index=true
    • https://eafa7026-a984-4033-a970-a28c173b6c34.filesusr.com/ugd/f14cf6_d585124a7cff405893efe2c850803eda.pdf?index=true
    • https://8f0e0c8c-edf7-4c18-8cc0-48fed1aa7bf7.filesusr.com/ugd/717a42_5aa62cfa9b724cf68289e44e8da23ccd.pdf?index=true
    • https://cbbaa9a6-2a08-4027-9e25-d8587ad778ce.filesusr.com/ugd/906e9f_19c52051cd5d468fb01136322df75e10.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/9041/9620/files/elgato_game_capture_card_software.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/67144806163.pdf
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/human_anatomy_atlas_2019_apk_paid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/ada_easd_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/26109680597.pdf
    • https://cdn.shopify.com/s/files/1/0446/6235/8179/files/psychology_of_colors_in_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0440/6951/9510/files/nugebolagiwikizawupebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/73252406909.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/64674544934.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_off00012e19.bin
10f6350caee86d76efe675614d5c8a53f2307435d1bb33866bdf0ca7ac253a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E19 5548 bytes
font_01_sfnt_off000140f5.bin
ca1acb9c10dd2d85199f73aaa5e3d7aea9e0de61b9bcc9268b030f494b17ca07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140F5 10192 bytes

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