Malicious PDF — malware analysis report

Static analysis result for SHA-256 7098359011217587…

MALICIOUS

PDF

46.5 KB Created: 2020-10-15 21:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97827986ad545378623991248f20037a SHA-1: 935c53f45032e73b03897b5754a0d31c0a5668bb SHA-256: 7098359011217587155d48838c918f33aadeed9fd69dabd8d071945c2aad8f43
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading games, suggesting a lure. The presence of many external PDF links further indicates a link farm or redirection scheme designed to lead users to malicious sites.

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=descargar+juegos+para+playstation+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f888e441a04a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f889bf3c8a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87f615d44b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f87b1d358786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8805f8b9f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f871a5624e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87f6c0ad942.pdfIn PDF document text
    • https://site-1039489.mozfiles.com/files/1039489/pumosoxesozofisigidakuze.pdfIn PDF document text
    • https://site-1043375.mozfiles.com/files/1043375/67811333556.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/1/0478/8446/8390/files/growtopia_mod_apk_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9359/7601/files/46996655303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/13310248661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1889/4498/files/wixilodiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e22db0-d374-485c-bca6-f280d27af1c7/kabatamowotibazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0382fad3-cfb5-4877-a158-f973aec0f5a0/bujubodeferadex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1880b0-3fb8-4981-ad4d-8f04afe641a3/rudetoberijurebuguragaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aecbcaf3-4621-4dc4-8c2c-1ea723ba793c/tugutugulupurotujego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c055107-e0a2-44ff-a632-feea6a129027/lepapuw.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_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 5420 bytes
SHA-256: ce9d9fb868188236739fa90d97e383aecc08a8dfdd75fe90858891536555716b
font_01_sfnt_off000079cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CD 15368 bytes
SHA-256: 7317569498ba537f2e248ce3c899cb8a8aeb08507bde062a7d39217a124dc76e

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