Malicious PDF — malware analysis report

Static analysis result for SHA-256 387a1ed83d65de54…

MALICIOUS

PDF

43.7 KB Created: 2020-10-26 17:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7c8f4dd979fe18befc1a73a987e867f6 SHA-1: 18a96bc8f7304a6e89fb6087a50a611be5ed36ad SHA-256: 387a1ed83d65de542ecb53f2a3390e76d8307d2e6b27a44be951067966016813
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?keyword=root+android+device+2020'. Additionally, it exhibits a PDF link farm behavior with numerous external links, many of which are benign Shopify URLs but also include unknown Weebly URLs. The presence of a 'download button' lure and ML classification further support its malicious nature. No scripts were extracted, but the document body contains the malicious URL and other benign-looking PDF links, suggesting a social engineering attempt to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=root+android+device+2020 In PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/7512832.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/bibawi-koxesu-xasoluv-wifoditonapa.pdfIn PDF document text
    • https://bisitewo.weebly.com/uploads/1/3/4/4/134496646/7477546.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/zaguzuxus_mubesaze_gunirik.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/8e4916a90d73.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/bc4a3c26.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/sotamumoz_jonurulotomif_xabonutaxelu.pdfIn PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/3275952.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/bewodoves.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/1/0437/6494/0961/files/the_wolves_of_mercy_falls_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1860/7521/files/george_washington_carver_quotes_on_service.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9809/3733/files/bitcoin_wallet_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4703/4266/files/ea_sports_offline_games_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7171/9574/files/50061575660.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/sql_server_2014_installation_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/88074437559.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/urdu_encyclopedia_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/93247185226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb276433-f4df-4b5a-af4c-cdde311ed56c/mukoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f59f72-4bab-4af8-b2d7-16892673938a/32137480205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e15d18-0ff0-44b2-aa14-c38d38026a04/19686855739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdedc7c-7e8f-4af1-93b2-621433ec5359/36881505055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736628e0-8dab-4d37-9a45-1414fa3a0574/28864077998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83524c4-654f-45b6-abd0-d27eb1e22055/tisupuzufinafewagimazej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56662cb-6d0f-44ea-b7f1-d446d3868ed5/12964553787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4601cf-38b9-4c56-9361-270d439286fd/datulaj.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_off00006cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 5064 bytes
SHA-256: 178aed1a43bcdb6fb295db8b87ad69b048de05ff2b0941fd9fefdcc7739df261
font_01_sfnt_off00007e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0D 10360 bytes
SHA-256: 7fc64782cea17d9c660c453eb626b40b183d34a3c99ecd8c00b2a3e256618514

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