Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19ce12f3a1c7250…

MALICIOUS

PDF

38.4 KB Created: 2020-09-05 01:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 24b449814ff34ecd11244bcd81548b96 SHA-1: 2bd67c17436b261e87e66b64b2fede2ca85f81bc SHA-256: e19ce12f3a1c725073b9df7842fe910397ec4221ee8f8c2cacd74279fab69578
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, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded document body text also contains the primary malicious URL, suggesting a lure to a potentially harmful site. While no scripts were directly extracted, the PDF structure and link farm indicate an attempt to lead the user to malicious content.

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.link/wix?keyword=blood+in+blood+out+soundtrack In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/64f9d2_25f36d0e05054d2182ac2d21787a21bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fa5618555b194b2882f6d66162cbb146.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0abcaceee78f4e7dbff6621253b4b752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5648/6807/files/zofaxifuvopof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/gelijidefodomobopog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/46228033060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/salodenebob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/vigow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/22589664322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/xobevomupagedibelalinili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/facebook_video_er_private_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6521/3079/files/lisowunaronevek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8E 4952 bytes
SHA-256: 0b64a89d54ea80c06ab9da6299e0febcbd066c5485d18300cb6d96b53d550d0d
font_01_sfnt_off00005c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 9992 bytes
SHA-256: f33bb5ff1fb1ec5cdaee6c376262913cad6b2cacaab1b7ad241180082bfa9236
font_02_sfnt_off00007e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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