Malicious PDF — malware analysis report

Static analysis result for SHA-256 328ad93f487a3c56…

MALICIOUS

PDF

42.8 KB Created: 2020-09-21 03:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 719db2d4b4df0eb3279cb66489523533 SHA-1: 9ebb1ce713e33e39812fb0c5be47e8837df0dfdd SHA-256: 328ad93f487a3c569c33341e24777fc2a4d8113d0a06acfcec28d52d7b689d2b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique commonly used for SEO poisoning and phishing. One critical heuristic identified a malicious redirector link, and another flagged a large number of external PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The primary intent seems to be directing users to potentially harmful websites through deceptive content.

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.club/wix?keyword=chimpanzee+politics+book+pdf In PDF document text
    • http://mujunekow.jeannehenry.com/uploads/1/3/0/7/130775934/6163813.pdfIn PDF document text
    • http://naliror.rainforestab.ca/uploads/1/3/0/8/130814328/wazira_pagutenadoser_buzexawakajode.pdfIn PDF document text
    • http://sijorex.mishagray.com/uploads/1/3/1/6/131637016/baxef-dewojilezak.pdfIn PDF document text
    • http://files.openroads.org/uploads/1/3/1/4/131406797/5536f40e561a78.pdfIn PDF document text
    • http://gositovol.culhamafterschool.com/uploads/1/3/1/0/131070227/lebebedar.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/1/0430/7858/2439/files/87588302322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/vesokir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/5965/5335/files/bomuwugira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/bladder_incontinence_icd_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0271/6572/files/29014368081.pdfIn PDF document text
    • https://f6f02750-c5fa-4393-a03d-2bb367aab60f.filesusr.com/ugd/d1d005_099af079ef5d44a3ac1de95b2b9a5588.pdf?index=trueIn PDF document text
    • https://345bdd64-550e-4c28-8f34-613d94c39693.filesusr.com/ugd/9734e7_1c6f5e50cb174c0581510878e320cd13.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/nasoviporegimopidolibef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/great_expectations_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/nice_guidelines_sepsis_neonatal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/xslt_xml_to_json.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 1

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_off000068bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 5456 bytes
SHA-256: 642ef319b7939012ef1e7b79044658d4ef0cc882eca81e535e969ab9bbe2c30b
font_01_sfnt_off00007b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 10244 bytes
SHA-256: e1752baab4ab312f57365e9337c930bd30f2dfd38c2074535eb63041959c53c4

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