Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10d624e179e0ee2…

MALICIOUS

PDF

44.1 KB Created: 2020-10-30 05:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e55e2c64f7136206a3e1e20e92c9053 SHA-1: 7ffc5f05393814f02f02708d13477e56afeb0ddf SHA-256: d10d624e179e0ee29da5a05f2022dac63900ba86ea688ad01efdafc93f9fac78
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, alongside numerous other embedded links. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The presence of many external PDF links suggests an attempt to drive traffic to potentially malicious content or for SEO spam purposes.

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/123?keyword=serpent%2527s+shadow+pdf
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/fca1b.pdf
    • https://rofetidol.weebly.com/uploads/1/3/4/3/134322454/210fe.pdf
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/kemirolalapur_zugajedokuf.pdf
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/dagowadok-zadubavagavazux-wolezisiwoju-padezodaxa.pdf
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/7604763.pdf
    • https://cdn-cms.f-static.net/uploads/4409619/normal_5f96f1613a91a.pdf
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/4825191.pdf
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f9963863c6f0.pdf
    • https://giximelet.weebly.com/uploads/1/3/4/2/134234701/d0ec8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6efb76b2-ebc7-429f-8e09-f632ec85116c/96826464141.pdf
    • https://uploads.strikinglycdn.com/files/a92acaaa-cb1f-4f8d-a645-7ceb6810d69c/fabevojejosumosanuno.pdf
    • https://uploads.strikinglycdn.com/files/3db5ec09-9b49-443b-9be2-0e10cb93f2e6/51299226930.pdf
    • https://uploads.strikinglycdn.com/files/fd4ee9d0-5d2a-4e91-b76a-a8b24b1b818f/waialua_high_school_robotics.pdf
    • https://uploads.strikinglycdn.com/files/3aed4206-1bda-47eb-8efb-6904b303c704/11444907745.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_off00006e05.bin
8548d7b91e44bf9b12380314e83de90e515eb62995515421a87a24108ea7edb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 5324 bytes
font_01_sfnt_off00008035.bin
a7ee30fba9a4dfa24a0ae0f5541d4df2f6e8ad8407888bf8c6df8263b049181f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8035 10480 bytes