Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acf32de51c35bfd…

MALICIOUS

PDF

37.5 KB Created: 2020-08-19 08:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 394609cf6c9cf00e921d8bc577024a80 SHA-1: a9564b4e5a8d3854050af1b8968291ec4f8bee2f SHA-256: 7acf32de51c35bfd8159818ae0d58ec809464b3ea972ef388ad041c405de9b7e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure to encourage clicks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.cc/pify?keyword=alaris+pump+module+manual
    • http://rumiviv.understandingwhowewere.com/uploads/1/3/1/4/131453540/tilinafiwud-pivisaxemoji-jolujako.pdf
    • http://xuwed.rochesterconcretecontractors.com/uploads/1/3/0/7/130738848/4176586.pdf
    • http://files.stmichaelukrainiancatholicbaltimore.org/uploads/1/3/1/6/131637853/vetadiwopuje.pdf
    • http://farimos.softandsound.org/uploads/1/3/0/9/130968996/5056b37.pdf
    • http://files.lisahartconsulting.com/uploads/1/3/2/8/132815190/padeworuxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/graded_potential_vs_action_potential.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/adenovirus_replicacion.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/99157193545.pdf
    • https://cdn.shopify.com/s/files/1/0450/8064/1699/files/wuxevalopimadujukowof.pdf
    • https://cdn.shopify.com/s/files/1/0451/1747/2922/files/nvs_ldc_exam_2019_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0441/0828/4056/files/lyrical_ballads_wordsworth.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/kiresoreropibokeba.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/26095698307.pdf
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/xumupuxev.pdf
    • https://cdn.shopify.com/s/files/1/0435/4293/7759/files/wufafajisetomovomexivi.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_off0000558d.bin
0ddb66621ef0a9591731a441dcd1027fba2610f519c5462c67d7f7200497d6bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x558D 5092 bytes
font_01_sfnt_off000066c0.bin
17857758969551bd9524b970ea9913f57b13add80fa50204b3206a79d10127a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 10352 bytes