Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b96dcc9fc48ce4…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 21:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 381ce4b65542895fe2443601decb8927 SHA-1: 0502907c77d2f6e1adee5826911a5929fd9f8700 SHA-256: 03b96dcc9fc48ce4a037013a0ee361b7d5946855c9b6ad3480eb330338b13b78
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits a link farm behavior, embedding numerous links to other PDF files, likely as a SEO spam or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=absalom+absalom+online+pdf
    • http://rudesog.dominoeffectdjs.com/uploads/1/3/2/6/132682883/337092.pdf
    • http://nilofafof.dpoffice.org/uploads/1/3/1/3/131380042/4c78c84.pdf
    • http://files.kwonseulgi.com/uploads/1/3/2/3/132303407/b370d469bc3497b.pdf
    • http://fowibe.theblissfulbaker317.com/uploads/1/3/1/4/131408899/dudotosegetug.pdf
    • http://files.sausagedogproductions.com/uploads/1/3/1/4/131454383/nelonigupuruwo-vutosuliso-rakexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/mizasunezitebaxutivabali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38655606666.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/kixuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5247/files/nirubaxikewijamilusakosan.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/solving_bernoulli_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/context_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/puxusataxaloxegoban.pdf
    • https://cdn.shopify.com/s/files/1/0439/3975/8235/files/37351303077.pdf
    • https://cdn.shopify.com/s/files/1/0435/7193/7439/files/79xx_voltage_regulator.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/pazifizibiloponibavuz.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_off00006d48.bin
8a835e17ef1b3407a3b2ead62361a3b0b844f258df800d5ab8138088c5c393a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 5220 bytes
font_01_sfnt_off00007eee.bin
ae0a74ea36f3b921df6aefeff77afa55c0d39a713f4dc9db7f12b0ca98ec19ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEE 10876 bytes

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