Malicious PDF — malware analysis report

Static analysis result for SHA-256 06738a90809ab837…

MALICIOUS

PDF

30.6 KB Created: 2020-08-15 09:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97de4278e4087dfe15d92b7a16540dad SHA-1: 7f8dc1ee5068b0b30041547ffb3c87e2b149ac50 SHA-256: 06738a90809ab837f261717eb2d1380bf9163e043f81dbeefbb236a911de0ace
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed to distribute SEO-optimized PDFs. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/wb?keyword=pcnc%201100%20manual, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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=pcnc%201100%20manual In PDF document text
    • http://files.seelenleben.ch/uploads/1/3/1/3/131380951/19288ada1bc346f.pdfIn PDF document text
    • http://bafupukav.tritonchicago.com/uploads/1/3/1/4/131438003/zatenatavimeluja.pdfIn PDF document text
    • http://zolun.suzypal.com/uploads/1/3/1/6/131606183/a077457dc9f4c9.pdfIn PDF document text
    • http://files.directdoctors.org/uploads/1/3/1/0/131070336/125763.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/1/0430/3434/5625/files/alopurinol_posologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/vernon_ct_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/bitsat_exam_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/divujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/equidad_de_genero_ensayo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/comptia_cysa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3789/7383/files/approach_to_syncope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/98910383816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/laruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/12347732854.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 2

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_off00003ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EDE 4868 bytes
SHA-256: d5a7fd04dbbf464630fc2a5cb569498b7d553ab2f6a955de5c16ab9c63295f1b
font_01_sfnt_off00004f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F58 9004 bytes
SHA-256: 960aa6ba43a29c44046efe7df3a03065ebe39e9e5a394ec9423c8a3b60ca15a7

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