Malicious PDF — malware analysis report

Static analysis result for SHA-256 646fd682ef6bd235…

MALICIOUS

PDF

39.1 KB Created: 2020-08-24 22:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 274a6fd5250ef2399375330f2685864a SHA-1: dc1b1b8d1889a4fbcf9d3b0f3ea3e88221e607e3 SHA-256: 646fd682ef6bd2357756f01dd97fde6704b7b733ec855eb55387b0acda5a3ed3
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links designed to create a link farm, with the primary goal of redirecting users to a malicious URL via a SEO-themed redirector. The document body itself contains the malicious redirector URL and numerous other PDF links, indicating a phishing or scam attempt. No scripts were extracted, but the presence of multiple malicious redirector links and the link farm structure strongly suggests a malicious intent.

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.ru/pify?keyword=simple+articles+exercises+pdf In PDF document text
    • http://nomejil.transpsychlab.org/uploads/1/3/0/7/130738730/jerozomatunofoguwado.pdfIn PDF document text
    • http://xorar.willowsmeltingpot.com/uploads/1/3/1/4/131407300/betalil_bapupegedireg_kurimuvugupowe.pdfIn PDF document text
    • http://files.councilofgiants.co.uk/uploads/1/3/1/3/131398547/6416889.pdfIn PDF document text
    • http://files.frechettefarms.com/uploads/1/3/0/9/130969403/xukukewefarizarek.pdfIn PDF document text
    • http://files.thursdayisthenewfriday.org/uploads/1/3/1/3/131383398/sofaraf.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/1/0429/5042/6780/files/wugaxeroper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/82869864534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/betoxodanuvij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/bazaar_kannada_songs_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/speaking_skills_importance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0452/5720/files/xilud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5775/2733/files/arterial_blood_gas_analysis_an_easy_learning_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/weight_lifting_workout_routines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/28383421388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/uninstall_mysql_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/sound_waves_physics.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_off0000578b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x578B 5472 bytes
SHA-256: e609c48456e17f825b2aed040bbe78e3ef61391417014daf698e6babf2f535e8
font_01_sfnt_off00006a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06 11776 bytes
SHA-256: 271f4d061e712a1d300e71231dbaf615ecd1b1faf9d89875366cfd54d0a7e84b

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