Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc3d13eebd5214a…

MALICIOUS

PDF

37.8 KB Created: 2020-08-25 11:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c765257fea5b0c2f0f717d0410de40a SHA-1: e3ffb96fdb988fb03d59826a5bb32373514a0693 SHA-256: 4bc3d13eebd5214a400173a4212eb274b89244f6a1fc7e644448327edd0b0517
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated but contains the malicious redirector URL. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites or manipulate search engine results.

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://ttraff.cc/pify?keyword=lagu+lily+metrolagu In PDF document text
    • http://files.sonnetaccountants.co.uk/uploads/1/3/0/9/130969160/datevimalesim_nolak.pdfIn PDF document text
    • http://files.orchidbakery.co.uk/uploads/1/3/1/4/131454355/7025712.pdfIn PDF document text
    • http://files.kwdealernetwork.com/uploads/1/3/0/7/130775393/xokexes.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/1/0432/3855/5805/files/3751882659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/carmina_burana_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/94303320102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/mopuliwodokuwazupet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/kaxakufonibepad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/wutosuwomimef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2834/8060/files/11786269394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/cakewalk_pro_audio_9_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/esl_environment_vocabulary_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7632/8355/files/color_by_number_worksheets_for_preschool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/bugdom_2_android.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 6

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_off00004a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A70 4648 bytes
SHA-256: 9d346cc3605555cc493c92ea801aaf3262a39ba72f43c48f87bb72f9eda6cf67
font_01_sfnt_off00005a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 10060 bytes
SHA-256: 525a201fe3c56421f555794d84bff200ce06c639fcdca9a2334085eb506e7763
font_02_sfnt_off00007c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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