Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e606e90caf9970…

MALICIOUS

PDF

37.5 KB Created: 2020-09-18 09:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78ed3d75e38412c18a3cd90afb4fae3a SHA-1: 340535e866a4c192759f3641c7b6ba065012f57c SHA-256: 12e606e90caf9970d9403eae81b91d5404c45c1d24365ec0cacf8694098b24a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to known malicious redirectors or link farms designed for SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL suggests an attempt to lead the user to a harmful site. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or malicious redirection attempt.

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.me/wix?keyword=ccna3+final+exam+packet+tracer
    • http://lazel.tygerzhang.com/uploads/1/3/1/3/131380005/bogadu.pdf
    • http://files.ginaword.com/uploads/1/3/2/6/132680922/nidesaxotal-sebovavu-gufogot-fojupof.pdf
    • http://files.blakeyhastings.com/uploads/1/3/1/4/131437926/rexapi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/exercicios_alcoois.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/country_of_origin_labelling_australia_guide.pdf
    • https://918688b0-a20e-4873-bce3-24a3b7364219.filesusr.com/ugd/d5415a_60fc2fd05f344d24b8693a7b6593b23f.pdf?index=true
    • https://6e396a2d-39b6-4260-9061-ee3950ee25a5.filesusr.com/ugd/3eb4bd_6acd5f8848c6493a85c9a0e9b354d656.pdf?index=true
    • https://0bf3f075-f2d1-42c9-8499-93dd0d8fb223.filesusr.com/ugd/a51aec_b461236ff101480a88f2ce4dfb711582.pdf?index=true
    • https://a32c4d0d-dbe2-4123-9315-a9ddf14e8155.filesusr.com/ugd/370b54_f96e298770084f92be654776328c5bb6.pdf?index=true
    • https://2d5d0949-0e9b-430b-9e83-bdbd3cba5cb5.filesusr.com/ugd/451a43_6220963ec65442038be0a74be44885bd.pdf?index=true
    • https://3e64c26e-ea59-4341-8c95-9b8c957930a5.filesusr.com/ugd/418e76_84835df7fc7e48bc8e7b6413de38bfcf.pdf?index=true
    • https://822cba26-0517-4a58-99b8-421efe55d7cc.filesusr.com/ugd/3f80ec_79f21c3a377c4635ba08bd916f139ee4.pdf?index=true
    • 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_off00005700.bin
e7dd2a349b4b782c2d36d23455ef2fc11ddeab000472d28bce84b23647120e55
pdf-font-stream PDF embedded font (sfnt) at offset 0x5700 5184 bytes
font_01_sfnt_off00006899.bin
524b5c532f6b19ed5ab160de0c105662c2bb817673794b890c80e1f7dd175149
pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 9632 bytes