Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cff555970a5b2b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-11 09:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd9adabc0816ddcf335d386167569cd SHA-1: ea409d407d1ce0c708b0671ba16430e9ccfd7059 SHA-256: 14cff555970a5b2baffc7f14059bd980256f62c29ff4fe4873c78b3c84dbdefd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a social engineering lure, presenting itself as an autism diagnostic interview PDF to entice users to click embedded links. The primary link, https://ttraff.ru/pify?keyword=autism+diagnostic+interview+revised+adi+r+pdf, is identified as a malicious redirector, indicating a probable attempt to lead the user to a malicious site or download. The heuristic 'SE_BROWSER_INSTALL_LURE' further supports the social engineering aspect, suggesting the document aims to trick users into installing unwanted software or extensions. The ML classifier's high confidence score reinforces the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=autism+diagnostic+interview+revised+adi+r+pdf
    • http://files.resortinnovation.com/uploads/1/3/1/1/131163761/5df4254dd30.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.zemskovdanceacademy.com/uploads/1/3/0/7/130775647/zejonumunumixulo.pdf
    • http://sifaru.djmarcdimera.com/uploads/1/3/0/9/130969472/bowoleseb_fevomirodini_dexexokowulu_sawokipaned.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/19936085345.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/aiou_admission_form_download_for_new_students.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/vikodez.pdf
    • https://cdn.shopify.com/s/files/1/0439/2130/9851/files/30_beaglebone_black_projects.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/daughter_incest_gif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/ropubedovamijelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/18243640748.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/33719647215.pdf
    • https://cdn.shopify.com/s/files/1/0435/1292/2264/files/mirubukilireroso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/centre_pivot_irrigation_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/bible_commentary_on_the_book_of_romans.pdf
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/kalagif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.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_off000063df.bin
afc5c6a953f49a9081e2e9f3f388a6bd63333ac1d11f54ab633b8d4d21badc71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 5584 bytes
font_01_sfnt_off000076cf.bin
63c05e4f9ce96631c61a8d180280dad03857e92d8995209b46f026b6f4691e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 10076 bytes

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