Malicious PDF — malware analysis report

Static analysis result for SHA-256 3831a73dd10bd8ca…

MALICIOUS

PDF

34.2 KB Created: 2020-10-31 04:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 11890d392f50e262bf6050bf49006bad SHA-1: 72f24faef433ecf03b8c140dbf3a63d39b711c63 SHA-256: 3831a73dd10bd8ca4bf2aeb495fd951b3c2e8102c4863b992bbaac2744853df4
94 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, https://ggtraff.ru/pify?keyword=ispoofer+ipa+download+reddit, is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. No scripts were extracted, but the presence of a malicious link suggests an attempt to redirect users to a compromised site.

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/pify?keyword=ispoofer+ipa+download+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f927aba04a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f8b6c815e07d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5f997fe3bacb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f887fdd41057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f914ccb36cd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f93ec0263e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5f969d7348709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f977ca6f0f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f8e9a1287dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f9cb9e74dbc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0196acc-e2e2-4252-9442-92e7ced52c50/lg_oled_optimal_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/watermark_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef089114-2c96-47db-9d0f-79c41d5b8290/mumuzewubuz.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/sunabotubawuker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9540811a-ad4b-4951-a618-582354205a92/dark_web_links.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4f1f59-5191-42bf-8c4a-0113d13086ef/pizzazz_answer_key_book_c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4918 5064 bytes
SHA-256: 8bf90ae0c415486c526ca5a62b2732f921fcb19f6fac97969c40ec0c8102a826
font_01_sfnt_off00005a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A73 9728 bytes
SHA-256: f5c8d2caf931f1bf1f2ede01a2270335685e60e2d2ed8415031ca04ec7704388

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