Malicious PDF — malware analysis report

Static analysis result for SHA-256 877f08da784c8bc2…

MALICIOUS

PDF

40.7 KB Created: 2020-08-28 10:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 239ac7bea41414e1bfe3209fecc63a9f SHA-1: 19e0053c1f87acdbf08690acf3ff8676e6f6e83d SHA-256: 877f08da784c8bc2953bf0c3b8d9cf0b9c7f5737e55aa7b6fc2f129b53c28e11
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as legitimate educational resources, but they redirect to a malicious domain (ttraff.cc). The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malware or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=fsa+ela+reading+practice+test+questi In PDF document text
    • http://files.revivetheroxy.org/uploads/1/3/0/9/130969624/f915fe38be5f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0436/9602/9864/files/fodewanel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/85704528457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7366/7225/files/vetozexubaxujupirisegufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/94860773104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/56112104553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5959/9777/files/king_crimson_epitaph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/77853586917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/voxengo_voxformer_serial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/sibojodepegizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58E8 1716 bytes
SHA-256: b3b188b8c9491feb47eff1f0fc65610575b3b9beea3dfcfba453a1b098664ae7
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5320 bytes
SHA-256: ab23e051d39589b626a14a19a5c9db9ef3c2037429e49e9f4be4c7a84f9169ee
font_02_sfnt_off0000735b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 10116 bytes
SHA-256: bedaeb31b18782124473ed91c617ab5a3991c470337626062c4fc14815ab5094

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