Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8e7889e9716314…

MALICIOUS

PDF

41.6 KB Created: 2020-10-10 16:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eeee5914133d380bf68cfc8bb9456439 SHA-1: 55693d3c941caddf9a1668b1decae32f22ab7783 SHA-256: 9b8e7889e9716314ae7266fe36b18d9a81ddac33855bbeb1f0bc81e7770fdda6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm and redirector, embedding numerous links that point to external PDF files, many of which are likely malicious. The primary URL, https://cctraff.ru/pify?keyword=sunjoy+octagonal+gazebo+instruction+manual, suggests an attempt to manipulate search engine results for SEO purposes, redirecting users to potentially harmful content. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a strong likelihood of malicious intent.

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://cctraff.ru/pify?keyword=sunjoy+octagonal+gazebo+instruction+manual In PDF document text
    • http://files.kerrydavies.net/uploads/1/3/0/7/130739628/runobowumugisox_fusuwamidedenov_molasajidusura.pdfIn PDF document text
    • http://files.tommybarrettbroadcasting.com/uploads/1/3/2/6/132695730/6334501.pdfIn PDF document text
    • http://rixogela.misssailin.com/uploads/1/3/1/4/131407876/ledalowosezok-guzogoxewuzot.pdfIn PDF document text
    • http://xagovu.uusl.net/uploads/1/3/1/4/131410685/tikoxizenirudit-borod.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/1/0496/2091/0233/files/janine_cochran_st_cloud_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5639/files/domain_and_range_of_graphs_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/denison_community_school_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/members_only_faux_leather_jacket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2726/7235/files/kuxepukikisedobexas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5127/8755/files/healthy_lifestyle_article.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4679/3127/files/83406182889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a7e217-a05d-437e-9555-d0f72597a44f/wagamulixorozibobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0b88d3-aaf1-4edf-b8c8-df401adc431d/fijilugiviwu.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_off000066ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 5588 bytes
SHA-256: 6cdd8c275ebd35ea2d3e43ad67285e09e6e37d0ecb69890f370472115bcd9ab4
font_01_sfnt_off000079eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 9312 bytes
SHA-256: 52562c064dee104c7f5e85243f4ebdb3ee9685bb9889e8ebb60997497e93e2aa

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