Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b74ecdb87af7639…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 09:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c118a19bd5be9f2f3df78fd7a0b98e6 SHA-1: 0f4680da468ed15531af2edfdff2cd3f978f9d45 SHA-256: 0b74ecdb87af763966ebdf659be5a493cb937e7e7a811ad557c57f2a865c8352
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL https://ttraff.com/pify?keyword=billy+joel+just+the+way+you+are+pdf is a clear indicator of a redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interaction for malicious purposes, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=billy+joel+just+the+way+you+are+pdf
    • http://files.thesolidrockndchurch.org/uploads/1/3/1/4/131408954/vituni.pdf
    • http://files.rooznote.com/uploads/1/3/0/7/130776166/vugorirunak-rafabe.pdf
    • http://files.bayjedesigns.com/uploads/1/3/1/3/131379833/zexirokimipu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/steven_universe_season_5_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/fexosaseribili.pdf
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/74365084436.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/xobajedibujig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/subaru_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/super_deepthroat_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/68543306619.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/virology_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/8222801044.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff6.bin
1d7ea5e1c3476a30358475f5c6c80773a7eb0f6d773235d5118239eeb0c46bbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 5448 bytes
font_01_sfnt_off0000829b.bin
63edabee702f0a94640a75bff973f02ca95268194715bf72d0dae899774e465c
pdf-font-stream PDF embedded font (sfnt) at offset 0x829B 10364 bytes