Malicious PDF — malware analysis report

Static analysis result for SHA-256 870c83e1b8284d1c…

MALICIOUS

PDF

76.3 KB Created: 2020-08-10 14:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70234d3ce89e60ffed0bd224596ba84c SHA-1: 39152e4ff32f4170702e7f1a932482d7c772400b SHA-256: 870c83e1b8284d1c60b17f6f635877cdafee792847ab165ef3d12de6df891160
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains a URL that appears to be part of a phishing lure for French grammar resources. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

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.com/pify?keyword=apprendre+grammaire+francais+pdf In PDF document text
    • http://ledus.takodadogs.com/uploads/1/3/1/4/131438474/52a2738ce.pdfIn PDF document text
    • http://files.samdrakeracing.com/uploads/1/3/1/4/131438557/dedagu_wodawanidepadu_xiwibat_dibuk.pdfIn PDF document text
    • http://files.roadhousegrillandbar.com/uploads/1/3/1/8/131856995/441713560235.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/1/0436/4759/8742/files/nusutegikesoviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/romekimupubezelazuwek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/college_algebra_gustafson_11th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/vuzefonowazarewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/file_clerk_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/73597215886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/ethiopian_federal_supreme_court_cassation_decisions_volume_21.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/clipboard_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/cover_letter_for_teacher_job_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/72247831204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/tirivibesowoguwis.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_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 5432 bytes
SHA-256: 0d5356bc33fe0e8ec246d528992351ad0572b73f2e4e6542dc3b102f70cb4099
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 18028 bytes
SHA-256: 18a2e2a5fd5a6d15b3c131690395dfe5fd4c1d281542a99813320c9e74b17bcf

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