Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bff799472238b10…

MALICIOUS

PDF

46.3 KB Created: 2020-11-04 17:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a2d45588eb0b046bf8dd5b672f4435b6 SHA-1: 17c3f03f7de41f51c13ec5f16d84ae7eb68ce12d SHA-256: 5bff799472238b10e849f7100da74201d1260928c5ed6ab739019b80148eb861
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a printable tax form. This suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ggtraff.ru/strik?keyword=printable+1040ez+tax+form+irs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5fa22ea4dd67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f917f837d636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f9663169eb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f9cb7f14f67e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f9d3258a9836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f884f0de34e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_5f951bcd3b18f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_5f9bd1392cf52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_5f9ec02fd7e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f8869b88c968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5f93a1f55a2be.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/6a5f2d7e-9d59-446d-8a95-db78b85cdc8a/wizelutesodaxedosa.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_off000067ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 5244 bytes
SHA-256: f0d27218b6cce7c1b239ca05b7d88f552fc72c2b76b434de3afd863f50ef7067
font_01_sfnt_off0000796d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 10860 bytes
SHA-256: a27964b64aad4a872f1f96c579540029f735eae926c5ee9e439883d1f101c620
font_02_sfnt_off00009e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176