Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e01d74f9739357e…

MALICIOUS

PDF

39.8 KB Created: 2020-11-02 13:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf6fd3527d4ba341405e25974834c1f SHA-1: fac3dd9acbd866f2cdd63ee692e35b007dd3b96f SHA-256: 4e01d74f9739357e1dd902bb68affee5ded2eb7b506e4413c8b2c008d3a81fa7
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=neo+geo+pocket+color+emulator+apk'. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0433/8253/8403/files/solving_nonhomogeneous_differential_equations.pdf'. The document body, though heavily obfuscated, contains text related to the emulator and a URL, suggesting a lure for users to download potentially malicious content.

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://cctraff.ru/123?keyword=neo+geo+pocket+color+emulator+apk
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f931905d8c91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/solving_nonhomogeneous_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0500/3991/4646/files/botupuvozomov.pdf
    • https://cdn.shopify.com/s/files/1/0508/3660/3045/files/bepajobisefoge.pdf
    • https://cdn.shopify.com/s/files/1/0498/0467/3187/files/tanufuluvogebujupuf.pdf
    • https://cdn.shopify.com/s/files/1/0503/1146/3076/files/where_to_buy_fruit_trees_in_albuquerque.pdf
    • https://uploads.strikinglycdn.com/files/da76894d-ad4e-47f8-aa01-97f4d2750451/72799010455.pdf
    • https://cdn.shopify.com/s/files/1/0505/0872/6427/files/ophthalmology_khurana.pdf
    • https://cdn.shopify.com/s/files/1/0485/2347/7154/files/sosiguk.pdf
    • https://uploads.strikinglycdn.com/files/7d45e90f-0940-471b-ac07-e957c1dd2925/sinolalezogadenexurititiw.pdf
    • https://cdn.shopify.com/s/files/1/0481/5450/9465/files/goblin_slayer_light_novel_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0482/2899/1130/files/download_revolt_2_multiplayer_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0505/0272/9877/files/53723564908.pdf
    • https://cdn.shopify.com/s/files/1/0503/8125/8939/files/standoff_2_hack_apk_obb.pdf
    • https://cdn.shopify.com/s/files/1/0501/2770/0128/files/vojajod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005068.bin
92df51324b99e1576ba49760e67cbf38cdd84511d12799e822b22c47533db32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5068 4836 bytes
font_01_sfnt_off000060ee.bin
8b0fab0b570bdad6135f27d729c9817642bf0c5daff7cc560a3edfff0227253a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 10456 bytes
font_02_sfnt_off0000844b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844B 4324 bytes

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