Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fcf836e50cb32a…

MALICIOUS

PDF

149.7 KB Created: 2020-10-28 06:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 9eb9f29b5a11b91af7b9245779e8bb61 SHA-1: 1a5fa3e4afa9142406cd4c90511c6924979a9e40 SHA-256: a4fcf836e50cb32a6bd3d591b4fe343a99ea482e8fbb16150c6e34a9055544b7
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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://ggtraff.ru/123?keyword=madrona+elementary+school+rating In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f8834e73e3ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f8b44c33eab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f893deee8a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f98df4f4f576.pdfIn PDF document text
    • https://pezujotage.weebly.com/uploads/1/3/4/3/134318684/vunigef.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.pdfIn PDF document text
    • https://mikudone.weebly.com/uploads/1/3/4/3/134370159/3982458.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/2974814.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/xarodekugez.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/4ce098bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00020228.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00020228.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00023a05.bin)
    • https://s3.amazonaws.com/zuxadol/aadhaar_card_download_open_password.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/types_of_boiler_burners.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/64738818688.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/dewupir.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/36196390180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6597/5199/files/frequency_doubler_circuit_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/fatigue_risk_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/fakedidekipipezovabuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8479/9383/files/modern_combat_3_android_game_pdalife.ru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0996/4694/files/31551303813.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 extracted file (font_00_sfnt_off00020228.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20228 5248 bytes
SHA-256: bfec66ab88006fef09ddc94d4f35590f8b583f2b48a989a83ffd7088a4786bde
font_01_sfnt_off000213d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213D8 11384 bytes
SHA-256: a41b494a7a02080fea9f329bf2566c6b5629f7667df6024a71fdbfeffa965499
font_02_sfnt_off00023a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A05 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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