Malicious PDF — malware analysis report

Static analysis result for SHA-256 6309b512e678481e…

MALICIOUS

PDF

44.1 KB Created: 2020-11-07 22:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 240619f2673097b07a292b7390887724 SHA-1: c609bc9a839e957f2c4f598b7ec8196f73ea3bc7 SHA-256: 6309b512e678481e401bfa3dc8252ba10aa57c03079091b371520218ed8f739c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links, many pointing to an SEO redirector at 'traffking.ru'. The document body, though heavily obfuscated, includes the URL 'https://traffking.ru/aws?keyword=apush+chapter+30+test', suggesting a lure for users seeking study materials. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a phishing or scam 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://traffking.ru/aws?keyword=apush+chapter+30+test In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5f9f0f1b01834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5fa69c1b1e630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f979c4dcddf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5fa0452255b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f8783900ef9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_5fa35971b2eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_5fa59ee4d69e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_5fa6339987200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/vapifiri.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/magotajidewijejowes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefbcfcd-1f07-4ded-8199-4fc2b48c270c/jejidixunikodorej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2c22c1-fe6d-46b1-b2e0-abe1a8f9b2f7/61942678953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2171da21-b3e6-40d9-aa5a-94b040210e56/sazubuzegiwibowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786780f9-0185-43aa-8c33-885a189fe274/ejercicios_autocad_2d.pdfIn PDF document text
    • https://vibatam.files.wordpress.com/2020/11/new_english_file_elementary_teacher_s_book_free.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.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 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_off00006dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC1 5284 bytes
SHA-256: b526b0e86a036fa565fa55f1007dd951a58c434457638f6383899b7ebc10bdfd
font_01_sfnt_off00007fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 10360 bytes
SHA-256: 566dcf9e7fb88c4eb9944f4e9ae147e72aead1b28df790db6191c097e79c6969

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