Malicious PDF — malware analysis report

Static analysis result for SHA-256 0837fd9b598836eb…

MALICIOUS

PDF

51.7 KB Created: 2020-08-22 18:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9161e892807d747525c8853714aa3bfc SHA-1: 0c9aa667777f5b8ee162305f2815b716228881aa SHA-256: 0837fd9b598836ebba57595414ce984aaf62258863b7542ff65c7b0a29d581f4
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lure users into clicking links that lead to malicious infrastructure. The embedded URL and the document body both point to a redirector designed to impersonate a software download, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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://ttraff.cc/pify?keyword=fl+studio+20+autotune+plugin In PDF document text
    • http://tonupiz.oceanvalley.co.uk/uploads/1/3/0/8/130814328/risasezoxajopuligi.pdfIn PDF document text
    • http://biwoxariv.mhes-ses-bandstrings.com/uploads/1/3/0/7/130776132/83f9b973bfd75e6.pdfIn PDF document text
    • http://files.highalpinegenetics.com/uploads/1/3/2/6/132695601/wugaxofosakew_rotonenixu_mosujamasuxes.pdfIn PDF document text
    • http://risufoma.djkochymix.com/uploads/1/3/1/3/131384169/rosabilu-vafad-mupebonojazutu-muzumif.pdfIn PDF document text
    • http://ketazun.ghanaedcollaborative.org/uploads/1/3/0/7/130776068/rasagumimut.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/1/0427/9923/5228/files/fofilixamokanasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/diablo_3_xbox_one_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0099/3691/files/game_god_of_war_200mb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0110/1984/files/tecnicas_de_la_auditoria_informatica_yann_derrien.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/merge_bmp_files_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/spicer_u-_joint_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/46801257675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5F 5260 bytes
SHA-256: 7d0e0b37daac95f333e7e0aa990e87fbfa4fc48ce8af0390f1117dc038cc363d
font_01_sfnt_off00009e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E50 10364 bytes
SHA-256: eed86dfe020dc8a14e9e91a688d98017857b46bbbccf5a000bdff5e0e56023c9

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