Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd416aaf44a0c7bd…

MALICIOUS

PDF

45.0 KB Created: 2020-10-29 08:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a6214b63540084bdc44751d4786a23a2 SHA-1: db75945936efcb0da0813f8a2047ffd4bbfd658c SHA-256: cd416aaf44a0c7bddbd4f9e49c739fb1f015a0e9e2a950bb3dcc9eaef8041c8d
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/strik?keyword=naruto+shippuden+episode+107+english+dubbed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8c660d71b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f8d849320334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f878c0ccdb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f99e9c812d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f87151c6bb85.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/1/0495/7208/5926/files/61869588445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/45831558391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/80108429385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6723/files/19645328760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/fast_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/nice_guidelines_diabetes_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7153/8087/files/65285637785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8613/8532/files/coordinate_geometry_distance_formula_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1773/1733/files/95090458042.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_off00006105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 3816 bytes
SHA-256: 91be675a05f83834d5857df2ed0765fa57c6af270a078bf220a0422975df3823
font_01_sfnt_off00006ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 5604 bytes
SHA-256: c11dc284cc4c007416e500d04a6e4c4e3aafd7a390a32dda303d01d88d9fcefb
font_02_sfnt_off000081b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B3 10076 bytes
SHA-256: edbc46d107bede9e3fe10e7180b89ff46bcae61a4f41aaa2459f798994f668e8

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