Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9503839117b59a5…

MALICIOUS

PDF

85.2 KB Created: 2020-11-02 22:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c7563b314eb25c5c2fa221a8576d3c63 SHA-1: d2a5327d892166292231e4c292c9ea46f1358bc0 SHA-256: a9503839117b59a5509b88ee8e8a2dc17c9c79d048da6d176912301e4ea1dc55
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=mean+reversion+trading+systems+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5f9dc0c8563c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f9ee7f5e03db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f87360e359f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f95021cef709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8df30aafcb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f966f9bcd4bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3441/8586/files/important_economics_questions_for_competitive_exams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9415c76-9f72-4369-a7bd-51b903d8305a/xulazawubaxidogizuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfa70c6-26e2-498e-8a19-2c4849cfd1aa/55597031908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0388aee0-b701-48ed-b463-8ee81724960c/world_geography_spring_final_exam_review_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5acec874-7498-4939-ad1d-1bbf0b95f1b0/samurai_jack_season_5_ep_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4680b3c4-2670-4e81-93df-c72af5eecc7c/7290482962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83875600-f240-4dc5-8647-72b613da90b0/38272648936.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 5284 bytes
SHA-256: 89b97be7e1a6f0812ba6bdbca737d348d18e256a99fabb59cd38635a4e02a802
font_01_sfnt_off000112b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B4 11240 bytes
SHA-256: 84e4e23d4c2c2793802af6659e9467cd77d59fb7970a5bccc48a906042fcc7ef
font_02_sfnt_off000138e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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