Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b582c0a3fdc6517…

MALICIOUS

PDF

114.4 KB Created: 2020-10-02 21:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad3baf6865fa9defe0aed5610e69b321 SHA-1: 89441c03019a29eeac33742be7e7a59e8faaae25 SHA-256: 7b582c0a3fdc65173fedc3d452e1e40ff1d74370535122e2993cb56573c7a709
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, 'https://ggtraff.ru/strik?keyword=rig+veda+original+text+pdf', is likely part of a phishing or scam campaign aiming to trick users into downloading further malicious content.

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/strik?keyword=rig+veda+original+text+pdf In PDF document text
    • http://files.haulinaussies.com/uploads/1/3/2/7/132710795/duviwerira.pdfIn PDF document text
    • http://files.rewndusa.com/uploads/1/3/1/3/131398125/4463757.pdfIn PDF document text
    • http://files.drlisamurphy.com/uploads/1/3/1/6/131636991/371607.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/bazekoxuleka.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/nosaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/1776fd3b-eb85-453c-ab59-63ec7b44ceef/bivizoxebavunimivimedoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3db8212-92fc-4877-a286-754955992c31/zuvatexiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb7335b-32af-491a-83a0-276b12d10122/potuwafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/hd_jawa_on_road_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1176/7448/files/graph_of_cotangent_inverse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2279/4395/files/tomorrow_i_will_date_with_yesterdays_you_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3645/5324/files/49273426786.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_off000176fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176FD 5164 bytes
SHA-256: 8781be6d3e2687436b3840c9e580e5a41d3a48b41b90d1292c2fe061c9379f27
font_01_sfnt_off000188b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188B5 11556 bytes
SHA-256: bbd57f58eff1dff743c0ec9bb270cd90e54b72b72aec699e8143c2f29d44a254
font_02_sfnt_off0001ae37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE37 3564 bytes
SHA-256: 078e46546e3abcbf7a33bff2615794ead01f6ce25b4d8aaa2b4f707bd1f77086

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