Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d2e4060d2fe85d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-04 06:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e488f44217547432a2781b03e2a6c747 SHA-1: a6e00c0313d6b1a095cde40c2a93e8b3d46dae4b SHA-256: 31d2e4060d2fe85d6d53e96875d8079e0e3860c96aab21c6d3e4bd3fa93f117f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The presence of these links suggests the document is designed to lure users to potentially harmful websites.

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=the+blinkards+summary+pdf
    • http://files.todyeforcosmetics.com/uploads/1/3/2/6/132681501/navelubinekatix.pdf
    • http://files.mysterytomb.com/uploads/1/3/1/4/131453028/2543991.pdf
    • http://files.nlpandmbitcoach.training/uploads/1/3/0/7/130738917/9747528.pdf
    • http://files.nancello.com/uploads/1/3/1/0/131070291/vavizim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/mokojijow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/vupetegatoxejob.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/kinotesiwolibup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9078/files/fantasia_models_ceja.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/watch_brave_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/best_music_players_for_android_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/wipevuwisiziteji.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/db_password_filetype_env.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/31369606831.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b55.bin
84f6b69941fd3b68bef151f8740c65d557bb1170301f4ffae620dcb98a115569
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B55 5536 bytes
font_01_sfnt_off00007dfa.bin
75e90a8e6390bb12220e489072bb641ba358e8570c0e9315cb439753c062fd20
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 14564 bytes