Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdb1d25bdbf0430…

MALICIOUS

PDF

47.7 KB Created: 2020-10-31 04:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6ae48f2549abfefb00bf269db901e308 SHA-1: 5139611f80d715665d2f0dbfe0fe426856133769 SHA-256: 7cdb1d25bdbf0430414e467b5fa3047b5a921cb11b4db52fa31ff09bd0121531
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/pify?keyword=positive+action+words+that+start+with+k In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f9869c3d3c14.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/8105709.pdfIn PDF document text
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/792e8a7.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/xugugitoxolekode.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/xumuwopebaji-punalaruriniri-garilufodibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8555/2544/files/quartermaster_general_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/0026/4342/files/30278741777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8033/0653/files/hack_soccer_stars_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a04f32-538f-487d-a927-442ae08208b2/topographic_map_profile_practice_pac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7142/5697/files/24975367160.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/business_communication_notes_for_bba.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 5212 bytes
SHA-256: 602c2038766b8799f59cea3090df95b1d1336476164359beea7b5f778e4c20e3
font_01_sfnt_off00008ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD2 12312 bytes
SHA-256: 91c8fe2ccdac16b63cb29fc32f919eff9fd17a8e999dd34cc7d36d1b5f43adac