Malicious PDF — malware analysis report

Static analysis result for SHA-256 6092df6510476083…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 10:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43ea6f65922f86c177b1cca419d19377 SHA-1: 66d4a682f75da2880ea08db545722cfe2330a56a SHA-256: 6092df65104760835a83415014ba50de03b3a3c2d21c14e50483179ff912a7e5
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, a technique often used in SEO link farms to manipulate search engine rankings. One of the embedded links, https://ttraff.ru/pify?keyword=canon+in+d+guitar+tab+easy+pdf, is identified as a malicious redirector. The document's content and structure suggest it is designed to drive traffic to potentially malicious or unwanted sites, rather than deliver a direct payload.

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.ru/pify?keyword=canon+in+d+guitar+tab+easy+pdf
    • http://files.gabrielagamez.com/uploads/1/3/1/3/131384432/8214899.pdf
    • http://files.boshamretreats.co.uk/uploads/1/3/2/6/132681156/wisudafiliposurejuxe.pdf
    • http://files.acorridor.com.au/uploads/1/3/0/7/130739601/4048420.pdf
    • http://lusagaxa.ledrewcostello.com/uploads/1/3/1/3/131381428/e1794e69.pdf
    • http://files.westdenegreen.org.uk/uploads/1/3/1/8/131858287/50d6a396225dab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/zalubikurapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/8267430688.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/nupisuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/54972963855.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/28609745849.pdf
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/bcsp_code_of_ethics.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/31698804436.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/65202742227.pdf
    • https://cdn.shopify.com/s/files/1/0430/0511/6575/files/kunepinomudimemapupilole.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/jilomu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/xezanonukaxezavorevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/vrchat_eye_tracking.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_off00004e93.bin
1df65c0653e179e9ad6f0c9d518bfce8f53e7d1312026e6566ca80a37bff1201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E93 5324 bytes
font_01_sfnt_off000060bf.bin
3a486570a978be4d57e0b56a7d3920ee5da7c691bfbb2280c3f5d836a88b8f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 10144 bytes
font_02_sfnt_off00008375.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 4324 bytes

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