Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e55c5ba5f08f9…

MALICIOUS

PDF

53.2 KB Created: 2020-08-16 20:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c97651ce2827a8c5cd7c20c8b9935f20 SHA-1: f5c3ba42a304d1b1addca88b26d7960cb51e95c6 SHA-256: ab3e55c5ba5f08f91710260d279012bce81abf0ceed870964161360cb4f3ba7e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text suggesting a lure for an Android application. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. 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/pify?keyword=hdonline.+is+apk
    • http://files.copelandconnection.org/uploads/1/3/1/1/131164009/9389219.pdf
    • http://files.saramirbaha.com/uploads/1/3/1/6/131637291/bofipaxawuw-litivotoruw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/mac_cafe_antivirus_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/31401990261.pdf
    • https://cdn.shopify.com/s/files/1/0433/5163/8175/files/amleto_testo_inglese_e_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/fejukununiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/wagapatufulafoxumokinuza.pdf
    • https://cdn.shopify.com/s/files/1/0449/0254/7611/files/aulularia_testo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/4227014986.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/bharat_map_hd.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/scott_peterson_innocence_project.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/how_to_make_money_in_stocks.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/19198067028.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1e.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 6744 bytes
font_01_sfnt_off00007e06.bin
1bee740d98ce20aeaf8acb20414ccc71bdbbac695f1df4d551fdd17dd6971382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 4912 bytes
font_02_sfnt_off00008ed3.bin
aee2a4dc8c090dfb2a5553f8df8de4ccb649b79e9281b86eb665b9f164731044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED3 10364 bytes
font_03_sfnt_off0000b289.bin
3230dce6ac9cc1c618afe6e700bc01bad4c14b8490cb7e773368fe91bfaf5e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB289 16224 bytes

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