Malicious PDF — malware analysis report

Static analysis result for SHA-256 d115cdf26d08f90b…

MALICIOUS

PDF

40.0 KB Created: 2020-10-02 08:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ffb70575decc84af49cb6fda6e0be684 SHA-1: 3fc24d1c4c650cea96ae1eee1019a5cebd8b2186 SHA-256: d115cdf26d08f90b673ed973f55a2b6b7e92ac8b4bc9f1d69d00c9bdd66c46f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to improve SEO for malicious content. One prominent link, 'https://ggtraff.ru/pify?keyword=nba+live+mobile+hack+online', redirects to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also 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://ggtraff.ru/pify?keyword=nba+live+mobile+hack+online In PDF document text
    • http://zatigepu.maineartsedresources.org/uploads/1/3/0/8/130814448/wipugedizoleviz.pdfIn PDF document text
    • http://files.lonepinelogandtimber.com/uploads/1/3/0/8/130813317/tojefajati_zenovilufer_dononodun.pdfIn PDF document text
    • http://files.academicsuccessblog.com/uploads/1/3/0/7/130775567/pejupidilo.pdfIn PDF document text
    • http://files.bethanyhomestead.co.uk/uploads/1/3/0/8/130814515/ac71acaa4.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/45394805469.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/vazase.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/sowuribedafeporeruxexeki.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/1/0483/7015/5680/files/honda_civic_online_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0670/0963/files/70165363510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4321/1432/files/54153236775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/bejikozasetamupodanedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/ziwome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/great_lakes_genetics_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4848/0149/files/ap_computer_science_elevens_lab_activity_3_answers.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_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5000 bytes
SHA-256: 1a93526c3a604cd178eb300313e6054b5aa13d0f0f26c4bc2eddf1ecbc09e593
font_01_sfnt_off00007030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 10292 bytes
SHA-256: 189b2e569e3d25a43750871f0acb7965d65d53cecbf4ff12abf130f78255f271

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