Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd22273e06d6e3c…

MALICIOUS

PDF

70.5 KB Created: 2021-01-06 00:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07d3748f0d65eebec43faba2340b13ca SHA-1: b69cc1ee132c934bffe2a2b1cb5af3805349f64a SHA-256: 4dd22273e06d6e3cb2b21adab2e58a998430d46c993c0efe3b11eccee17b80bb
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was programmatically generated to host the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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://traffking.ru/123?utm_term=ground+state+electron+configuration+of+lithium In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_5fc2d23463b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_5fad39c278e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_5fdbe10aecafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_5fa46c8a3edb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vurifozi/QRDhfhb/bionic_hunter_vr_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f9ee78a17ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_5fb754209f5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5fb544781e6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fe791746d928.pdfIn 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://uploads.strikinglycdn.com/files/e99987c6-bc35-423e-9a7f-644ddb94e885/legend_of_the_no_face_doll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f55800-d745-45d6-8e5a-a88ebe3cde58/pillars_of_the_earth.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_off0000c600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC600 5348 bytes
SHA-256: be8394342a45d07928d510dc52aa886a78c207f16f1694f5f2441d0360ba2261
font_01_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 11600 bytes
SHA-256: e541c93d444696284cab4a78e4f6afb9727ad2bbd0fe4dea7db9e9c459202b9f
font_02_sfnt_off0000fee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176