Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b183e887d95305…

MALICIOUS

PDF

39.7 KB Created: 2020-11-05 14:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d118723c1d987fb0e98a5c3982d5082 SHA-1: 7a040eaffbfa3c0c040c2abf575127170d4dc798 SHA-256: 03b183e887d953058a82aeb57d4a24ea45d04188c908f9abd52f0d90c8121c3b
142 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically identified as a lure for unofficial transcripts. The ML classifier strongly indicates maliciousness, and the presence of SEO-optimized redirector links suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a malicious intent to redirect the user to a harmful site.

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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?keyword=unofficial+transcript+usm In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f9cfbd6ea8f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fa342265ddae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f871f7cd2d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5f9ec221133a0.pdfIn PDF document text
    • https://xufizigox.weebly.com/uploads/1/3/4/4/134479456/xaviz-tagalesapubalof-gixopatas-jufuzipuxukabu.pdfIn PDF document text
    • https://daxuferawul.weebly.com/uploads/1/3/4/5/134592581/nozezijoditig-pumixuxubif-baluxenegupo-fojafatoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f9b7164b4c73.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/tavelorida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f91ce8c880d2.pdfIn PDF document text
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/a4847d53a2a.pdfIn PDF document text
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/fbd97.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/64827530369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADF 5152 bytes
SHA-256: 504a42967ee2c23266131ed995da3e9db904124aac7af7f5c598352610406ad3
font_01_sfnt_off00006c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 11252 bytes
SHA-256: 356283dd986ef588116435cd27453994e414a018aca69c9d95396047edadb77f

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