Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b19efe0f174493…

MALICIOUS

PDF

45.4 KB Created: 2020-08-28 07:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130246b88469b10c7de928230806132f SHA-1: fb218a6f33be15356339650716860fd9c951420f SHA-256: 02b19efe0f17449332a2b006590f7a071c50f1e893912871e23ed86742ac993c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=zadarmo+Filmy+Online+mega+filmy'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=zadarmo+Filmy+Online+mega+filmy
    • http://files.en.les2lacs.com/uploads/1/3/1/4/131453982/ac2fe22.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/cbse_psychology_class_11_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/gidifajewawujunemiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/nisunisarotiwoxuzudida.pdf
    • https://cdn.shopify.com/s/files/1/0461/2092/7396/files/9875029961.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/algoritmi_cubo_di_rubik_3x3.pdf
    • https://cdn.shopify.com/s/files/1/0469/4913/8593/files/nba_2k15_download_apk_data.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/logiluvejuvemafemosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/duvave.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4968/files/wovikeluzivegimekusozolem.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/zazibogafazedenasuweme.pdf
    • https://cdn.shopify.com/s/files/1/0436/5769/1289/files/notes_in_spanish_beginners_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0452/3976/3101/files/96749096830.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/rejixa.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_off000071de.bin
c58ed1040039bbbfc18116b0ba34773a48e1d7d5177057a8f1d332edb582e8e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5280 bytes
font_01_sfnt_off000083d7.bin
fe5e3f7de89c8987d25044cb2108beedb0378a9d3581f085f0b69657d360a1e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D7 10428 bytes