Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcb62cf19e3c2f0…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 20:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39ba8e75a94ad19ec2b5fd0feaed084e SHA-1: ccc8e0662428a6353b18545a3d41985d7d099871 SHA-256: 4fcb62cf19e3c2f0aac4fdb9255d68b192566c3ff84648b2913a8c9e911dfcd3
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=core+java+tutorial+book+pdf', is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains references to the lure text and the malicious URL, reinforcing the phishing attempt.

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.com/pify?keyword=core+java+tutorial+book+pdf In PDF document text
    • http://files.codamidwest.org/uploads/1/3/0/8/130814101/xafisuz.pdfIn PDF document text
    • http://files.mountshannonarboretum.com/uploads/1/3/2/6/132681479/2216766.pdfIn PDF document text
    • http://vibom.caregiverscontact.com/uploads/1/3/1/3/131380213/7986055.pdfIn PDF document text
    • http://files.icupearls.org/uploads/1/3/1/8/131856949/e2df3d468.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/1/0431/1734/6965/files/23515363342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/babugaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/39976862395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/radodime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8407/8503/files/58996181277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/82544515010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/94972181354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/vimupumowisagivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/bikorowimezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/2819896830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/ribowosesiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.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 6

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_off0000807c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807C 5100 bytes
SHA-256: af6a8139e887fd32717958aa23e0795b01479a238535f9356fe65fefe9148f17
font_01_sfnt_off000091e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 10412 bytes
SHA-256: e55c32c746ff50a7cbdc78e0a7653200b193541bc25e2f476cfc481ef2a0ed6d

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