Malicious PDF — malware analysis report

Static analysis result for SHA-256 672efdc2bd7eff87…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 11:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 793422389eb44b81da4806b55e8a35f6 SHA-1: 6de67ecfe97379ee40199b22d1ef5e39b7727cb9 SHA-256: 672efdc2bd7eff873a07fddf95aff11b7ce29e3321b0a1a117e1ec3c6c0baef3
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, indicating a phishing or scam attempt. The embedded link `https://ttraff.com/pify?keyword=historia+de+los+billetes+de+mexico+pdf` is a critical indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially 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=historia+de+los+billetes+de+mexico+pdf
    • http://bekorunul.dilmargamero.com/uploads/1/3/1/4/131437792/sositijon.pdf
    • http://files.middlebranchmediation.com/uploads/1/3/1/4/131408465/fc5101db368.pdf
    • http://mavexeg.ironsharpeningoursisters.com/uploads/1/3/1/0/131069934/loparikobo.pdf
    • http://files.czonecoaching.com/uploads/1/3/2/7/132741555/668c199645a20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/84303296416.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/pepegutemanipebowazupus.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/buckling_test_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/91084143715.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/gauge_theories_in_particle_physics_a_practical_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/disadvantages_of_biotechnology_in_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/59669059938.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/52061095305.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/leave_application_letter_format_for_office.pdf
    • https://cdn.shopify.com/s/files/1/0439/3258/2056/files/batman_the_killing_joke_download.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_off00006bfc.bin
351ae1cfc89f8be0511782301df3af238ea1f064a45f31b71b789ab13626b8a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 5468 bytes
font_01_sfnt_off00007e79.bin
3ab8a6b32cd989fb8459091b592ae8eaf589f1fa920cdf9f13cf1d8315a01672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 10696 bytes

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