Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6ad2b1754a2023…

MALICIOUS

PDF

46.5 KB Created: 2020-07-16 07:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 812e82f2b1049843ca7a94e77b763dae SHA-1: fd41e7d250ca51c2f70692cb87be161121acb12b SHA-256: eb6ad2b1754a202342b7b77a8227b401d814e5eba4636b27a1130095e75f7612
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One such link points to a known malicious redirector, 'ttraff.cc', disguised as a study guide for 'The Westing Game'. The file was generated using wkhtmltopdf, suggesting it was likely created programmatically to host these links.

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/wb?keyword=the%20westing%20game%20novel%20study%20pdf In PDF document text
    • http://files.pamelaabrown.com/uploads/1/3/1/8/131856071/5d1e652.pdfIn PDF document text
    • http://files.tellncallmobile2u.com/uploads/1/3/1/4/131453967/xamidorukupow-doderofokurevan-dejedus.pdfIn PDF document text
    • http://files.rxctechnologies.com/uploads/1/3/0/9/130969330/5931205.pdfIn PDF document text
    • http://files.fluid-venting-system.org/uploads/1/3/1/4/131407080/tagil.pdfIn PDF document text
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.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/1/0430/8919/9268/files/xizalivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/zizozesiritejodumali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/jemalosoz.pdfIn PDF document text
    • https://metazak.files.wordpress.com/2020/07/rojuweju.pdfIn PDF document text
    • https://jekiwex.files.wordpress.com/2020/06/tepewakamiri.pdfIn PDF document text
    • https://tijufujo.files.wordpress.com/2020/06/49295961656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/nigugire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/75120141108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/17699565017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/19659092490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9689/1807/files/xorekukoluwusapixulinitip.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_off00007503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5444 bytes
SHA-256: 791fe4bfce44d14a5997941dd391205be1445cc23bc30e8838f0bc606db5a56b
font_01_sfnt_off00008778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8778 10336 bytes
SHA-256: 42299a59d47d201516785c61b4febbd0d3c33c23063665dbb225998afa9e6d84

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