Malicious PDF — malware analysis report

Static analysis result for SHA-256 686f7c5afe0c19bc…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 11:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8ed07c3d60b4f9b329bd5e13e0cb802 SHA-1: 5bac81e75ef018e64ae7d0473febf386be41d515 SHA-256: 686f7c5afe0c19bcf47562bdd090a57007c9e81bdaa6eaff46d0f5e9fe40d7a4
194 Risk Score

Malware Insights

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

This PDF file contains multiple links to a redirector URL, masquerading as a programming tutorial. The ML classifier and critical heuristics strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware. Although no scripts were extracted, the embedded links and the nature of the redirector suggest a social engineering attack.

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/wb?keyword=delta%20plc%20programming%20tutorial%20pdf In PDF document text
    • http://files.stephanielin.co/uploads/1/3/1/3/131398362/56d39fd7d504.pdfIn PDF document text
    • http://files.ladyannestrunkomaha.com/uploads/1/3/1/6/131636807/588a702b235eda.pdfIn PDF document text
    • http://nematepek.serveuga.com/uploads/1/3/2/8/132814930/fexawelufaweja-tajobob.pdfIn PDF document text
    • http://files.servastaiwan.org/uploads/1/3/0/9/130969942/6f4731.pdfIn PDF document text
    • http://files.rafaelhohmann.com/uploads/1/3/1/3/131384589/rapibifeponubake.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/1/0433/2548/9305/files/14741901885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/44369915446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/data_analysis_with_r_tony_fischetti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/wenefofulilemuboduviv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/mimizijunozawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/75565257125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/segas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/whirlpool_duet_ht_washer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/kevok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/47406006068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/active_and_passive_voice_interrogative_sentences_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/26177823083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/85227286843.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_off000068cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5296 bytes
SHA-256: 0e131c79d2d7fb43ad535f3630ec6731866bb0ee4d9729b25252b20639965be3
font_01_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10012 bytes
SHA-256: 36703dd987d5aa2509a1df0e34692359c2deba5ca1cbef177afad9bc0d6134ab

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