Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41f2633b09442cd…

MALICIOUS

PDF

46.5 KB Created: 2020-10-28 07:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ae2c839b06a99387cb10a0d5843e1825 SHA-1: dc7f4e4a3947916d64c37a369414e31fee6cd401 SHA-256: e41f2633b09442cd6aba6971377322d253f31a90719b457677b9ac7178a71868
154 Risk Score

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/strik?keyword=nemesis+agatha+christie+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5f97a9640a62c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8bf5a34a1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5f9353d0e9dbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_5f94dab7021e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_5f950ab63073f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5f97fa88450e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f93aaf592b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5f946f122ff98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8f19b3322da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5f9532b5c5631.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/1/0498/7738/5374/files/avent_breast_pump_electric_or_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/84585207110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/bioshock_rapture_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/asme_code_of_ethics.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/amplifier_speaker_matching_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/kemulekupejoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/multivariate_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/tekesafesofexefeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/pandora_box_6_arcade_game_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/introduction_to_student-_involved_assessment_for_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/bulawuzulifitapujupifeti.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/75973003064.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tesajetudivelanatiror.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 5632 bytes
SHA-256: e623b6177695f9a95a935ec5559b716466a9b0eaf561a0a5e1178000f2a5eac7
font_01_sfnt_off00007299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7299 11380 bytes
SHA-256: 5bd06e6c236fbaa19be877e905b6e4324d6c97a76c191dc803094f3587de8716
font_02_sfnt_off0000973c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67