Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d15215f0677429a…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 09:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 871165034de2e6b8cb8afdbb9d16f685 SHA-1: 5f6e2a96b139172483bed15158b1f4b0752ec192 SHA-256: 6d15215f0677429a82e14edcff12e3786428b18d47de46adb172aa9bcf214e56
194 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text related to 'multiplication worksheets' and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent, likely to lead users to phishing sites or download further malware.

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=multiplication%20worksheets%20decimals%20grade%206 In PDF document text
    • http://nutige.ilovebuttercups.com/uploads/1/3/2/8/132814930/8752506.pdfIn PDF document text
    • http://files.ackthaihouse.com/uploads/1/3/1/6/131637074/c59c0dcd.pdfIn PDF document text
    • http://files.neilestrickgallery.com/uploads/1/3/2/8/132815388/d40bcd.pdfIn PDF document text
    • http://files.khbblaw.com/uploads/1/3/1/4/131438111/608d7449f4f14e0.pdfIn PDF document text
    • http://files.psychiatristsofdenver.com/uploads/1/3/0/8/130814110/5017681.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/1/0434/3080/5653/files/blockhaus_stuttgart_speisekarte.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3384/6175/files/liftmaster_888lm_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/hyde_park_chicago_zip_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/gakonijesevipesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/85145404234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/situvovuxomakagubok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/lezunasitunapeserupezenam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/13220546829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/fepokibuzabiwadozip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0875/7660/files/75071876969.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_off000058d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D1 5800 bytes
SHA-256: 45ce973f57e7447912a4c1bc0265cc3577f786a5532b99dc13cced941acc0642
font_01_sfnt_off00006c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C79 10268 bytes
SHA-256: 6e386557298bf2af50e415203e08f6895ed7327b59b420f65aeb1d57fce525fe

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