Malicious PDF — malware analysis report

Static analysis result for SHA-256 708ad38b0ebd9aa1…

MALICIOUS

PDF

65.1 KB Created: 2020-11-01 11:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebaa05d3093469a3701e443fefdcb816 SHA-1: 9d74ec8d2dc59fa1d7451a480e61e2c26a16c7bd SHA-256: 708ad38b0ebd9aa1cc828f55f77de27c4cf8921f0c56e49ff8ff262e43c10984
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://ggtraff.ru/strik?keyword=diepio+tech+tree In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f8e0236d62ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_5f9e4d13a9076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f8eac22e3351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f8898f874080.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazemi/albinismo_en_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/vodonadami.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zotoxopovuvokewabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7234/8870/files/uae_detailed_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f404c2-51ca-4e4d-bfbd-b07d406dabbc/miamisburg_by_the_mall.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/install_adobe_plugin_internet_explorer.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/174388934.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/maryland_vehicle_emissions.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_off0000a337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA337 9500 bytes
SHA-256: 72f912ee002be8b580d304b3c5d0ac954d36f67ea79e35b3522b5aaf09950fc0
font_01_sfnt_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 4600 bytes
SHA-256: b7e9c7fb70530ba26a7fc790c91aa9f4f864d0990282561dd9c24d6bbaa9072b
font_02_sfnt_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 10712 bytes
SHA-256: a025580fca37e6e8f18f41c9667f44d92a3b98878edaf8258246b050655e059d

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