Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4af90d39bb74d6…

MALICIOUS

PDF

36.7 KB Created: 2020-08-14 00:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c01ebf8aad5fd44b405f84e1f3eaee7 SHA-1: 0c3db3bcb4cd9dce03215c81048a1c5d8457a7af SHA-256: 6b4af90d39bb74d613c7a43f094c49f2c53881d63937ba8bbb79874e90f09736
202 Risk Score

Malware Insights

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

The PDF contains a lure for a 'free PDF to Word converter' and embeds multiple links. One critical heuristic indicates a link to known malicious redirector infrastructure at 'https://ttraff.com/wb?keyword=conversor%20pdf%20para%20word%20free%20gratis'. The document body also contains this URL, suggesting the primary purpose is to redirect users to this malicious site, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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.com/wb?keyword=conversor%20pdf%20para%20word%20free%20gratis In PDF document text
    • http://kixapojo.lyonsvet.com/uploads/1/3/1/3/131380213/5272690.pdfIn PDF document text
    • http://files.pugsinthekitchen.com/uploads/1/3/0/8/130874474/2188905.pdfIn PDF document text
    • http://files.gamestorereddeer.com/uploads/1/3/2/6/132681617/zilon.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/1/0435/3651/5221/files/71395013842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/49113821444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/lost_empires_of_faerun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/30567471301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/quit_claim_deed_illinois.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/modul_akuntansi_sektor_publik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/85603842170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/daxoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/25517253547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3726/5813/files/linux_centos_commands_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/71163873238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/orthographe_gratuit.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 3

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_off00005184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5184 5236 bytes
SHA-256: c0a711a1a628c5f11ad57739f732166c48b45999f19ed081600688cee6409f7f
font_01_sfnt_off00006376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 10068 bytes
SHA-256: 68c0aca82ddc7f432ef5daeb4fdd207cef04c134db9a748227aa554f4871c964

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