Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3ed6443c3d2500…

MALICIOUS

PDF

47.6 KB Created: 2020-08-23 00:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfda938f4ac1744abc914120b6be67e1 SHA-1: 0b9df23437f101ed031cffde5c211d6a3bf848af SHA-256: 6c3ed6443c3d2500e80190354160c3642aa738698d5e33ef5a96219ca5801ab4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a deliberate attempt to redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=video+er+app+for+android+2019
    • http://vuwuvim.oakfinancial.org/uploads/1/3/1/4/131438641/d6ab88f57ee7.pdf
    • http://files.bestgambling.co.uk/uploads/1/3/0/7/130738701/firagalitapat.pdf
    • http://nupeme.clearlyjoewhite.com/uploads/1/3/1/4/131455069/jumuvemogoj-wuwuvebozuru-bejazetobomup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/descriptive_writing_worksheets_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/83061199999.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/94180919217.pdf
    • https://cdn.shopify.com/s/files/1/0462/9174/6977/files/graphics_card_games_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/wuriwedamixarisijuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9560/3880/files/exercises_for_cerebral_palsy_child.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/botokituxeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/0011/8943/files/antropologia_social_y_cultural.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/25336942260.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/ganesarubafatewiduxaturaz.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_off00006ecc.bin
6f4df8bc05e2032cb65a2c18deab709817fcc40e2f93fac913992115734ee13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 4980 bytes
font_01_sfnt_off00007fbf.bin
53ebd007fd09b7e1a6adc104f55d15ceb5308a9255e794740521976450534535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 10364 bytes
font_02_sfnt_off0000a339.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA339 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.