Malicious PDF — malware analysis report

Static analysis result for SHA-256 611659a4ec70183c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 20:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d056db0094b7296dd1917cb7a55cea8 SHA-1: 5a65a52ef5cee7a08f489e77a04a25ab31732cc2 SHA-256: 611659a4ec70183cda11e856aa6eeb89177fe2420974a6b9df42699400c09146
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The primary goal appears to be directing users to potentially harmful external websites, likely for phishing or malware distribution.

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=android+studio+online+help
    • http://files.autospacanada.com/uploads/1/3/0/8/130815095/kivubetumora-rewezitotopijuj-dewafulowesu.pdf
    • http://files.graffitispotbengals.com/uploads/1/3/0/7/130775261/7912034.pdf
    • http://files.sioceansidecarlsbad.com/uploads/1/3/0/8/130874658/tafupel.pdf
    • http://petatobu.sigoaprendiendo.com/uploads/1/3/0/8/130814328/467568.pdf
    • http://files.julielordsart.net/uploads/1/3/0/7/130740017/rogeful-toxak-jasit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/intra_arterial_blood_pressure_monitoring.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/46981268317.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/tevaki.pdf
    • https://cdn.shopify.com/s/files/1/0449/9750/9278/files/agricultural_economics_and_agribusiness_8th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/suvugaxoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/fawuvup.pdf
    • https://cdn.shopify.com/s/files/1/0434/6419/6256/files/carencia_de_vitamina_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/addams_family_theme_song_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/79672839291.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/57530810089.pdf
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/85027100505.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_off00006e0c.bin
d3b4cbd867cf61629fbb72ba343e29a6e160d1daa40ad4af7480bfbaf23e40db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 4828 bytes
font_01_sfnt_off00007e6b.bin
5c4aa62c383233d961295b812abc344e097caaea9134fc56d7f815cd157fe070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 11920 bytes

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