Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe3d416c5faf76b…

MALICIOUS

PDF

46.7 KB Created: 2020-07-08 20:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 8c8211dff10f6a7ea846e4cf2fbd2241 SHA-1: 84d69da88f9f88faad97a2882b819f39e7eecdae SHA-256: ffe3d416c5faf76b15b6443bcae6c2dae63fca416291683b8c638c7c17a3cd28
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://ttraff.cc/wb?keyword=basel%201%202%203%20explained%20pdf', is flagged as a 'PDF_MALICIOUS_REDIRECTOR_LINK'. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the extensive link farm points to a social engineering attack.

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=basel%201%202%203%20explained%20pdf In PDF document text
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdfIn PDF document text
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdfIn PDF document text
    • http://files.rossband.org/uploads/1/3/0/8/130874523/poserobepezi.pdfIn PDF document text
    • http://files.glassfarmgreens.com/uploads/1/3/1/8/131871762/6a0e9.pdfIn PDF document text
    • http://files.theosophy-dunedin.org/uploads/1/3/1/4/131483019/xarika_fukuguluxugu_gemex.pdfIn PDF document text
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdfIn PDF document text
    • http://files.authorkimfox.com/uploads/1/3/1/3/131379612/kemunafejebos_furugamoros_vagububike_wivosoruda.pdfIn PDF document text
    • http://files.goodstuffprimaryresources.com/uploads/1/3/2/6/132681204/lamumolop.pdfIn PDF document text
    • http://files.seattlemossremoval.com/uploads/1/3/1/4/131406835/d8e0c288753b1b7.pdfIn PDF document text
    • http://files.makeupbybb.com/uploads/1/3/1/3/131381712/zinomezumajiwet_xamaminiwoxesus_radan_gekero.pdfIn PDF document text
    • http://files.camppepper.com/uploads/1/3/2/3/132302913/1217584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tapaxat304323837.files.wordpress.com/2020/06/6313930941.pdfIn PDF document text
    • https://mobovowafe.files.wordpress.com/2020/06/4740156480.pdfIn PDF document text
    • https://rokokexer.files.wordpress.com/2020/06/pisibegodeluzejuxeguwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5004 bytes
SHA-256: 63e75fb34f241970ee56fab6205573be5ddc376ddd2c431d6a18a55d196ff2d5
font_01_sfnt_off00007f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6A 17264 bytes
SHA-256: f8cd578b2956081ed6cf6442ff7a9b6c3706df3bb2d46f9bac5826ab8ce793aa