Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad9f8a2673a4617…

MALICIOUS

PDF

55.3 KB Created: 2020-09-30 04:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5807e04b40002c39c5f2f614f7739a8b SHA-1: f1089192606cd3cb8589fa52365960b0ab2f2281 SHA-256: aad9f8a2673a46172d1f4477039ba57206a71669d455512260cfcd2c82b6bc5a
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=fpsc+jobs+2019+advertisement+pdf In PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/98970000269.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/vujexubugo.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/detegagijazezamusodaje.pdfIn PDF document text
    • http://files.foodforvictory.com/uploads/1/3/1/3/131378838/jatazavokukoteregaxe.pdfIn PDF document text
    • http://jupiv.youarentaloneproject.com/uploads/1/3/2/7/132740948/5281112.pdfIn PDF document text
    • http://waduz.hthpta.com/uploads/1/3/2/7/132740750/fabiraxufebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/cloud_architecture_patterns_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/35812547225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/banorefimobazozegojaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9704/7447/files/zuratuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/9927745459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0333/8902/files/xitufurinekuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/avidyne_entegra_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/talorafa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a3bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA3BF 19084 bytes
SHA-256: 7535bc52ffc7cc86418726a3206c24e2e08f756c1c6f1db9c324603da67a1801
font_00_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 5768 bytes
SHA-256: 5d7927a5810f80874d195af37c34d38eb09ba6108de13334be59e806734808d2
font_01_sfnt_off00007727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 14060 bytes
SHA-256: a6802f8d89eb2b8af305dbcb9e47231484b63bb3145fb57aac3d97940335707d
font_03_sfnt_off0000c1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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