Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db45f916840ea50…

MALICIOUS

PDF

67.2 KB Created: 2020-11-25 18:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fac0f78028436dccff0e488ad39020f SHA-1: cd57417fb8541e5b6f3f2d2da887b3255d034531 SHA-256: 3db45f916840ea50b3c028ac53c7938a837415029b6cccdb63323630ab999ed8
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, ggtraff.ru, which is flagged as critical. The ML classifier and ClamAV also indicate maliciousness. The embedded URL is likely part of a phishing or malware distribution scheme, attempting to trick users into downloading or accessing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=sql+server+2008+express++64+bit
    • https://cdn-cms.f-static.net/uploads/4426071/normal_5fa3601b549ac.pdf
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8b5a2e966b7.pdf
    • https://cdn-cms.f-static.net/uploads/4467027/normal_5fb60a9a32ca6.pdf
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5fa83db08e441.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c1c53365-18c5-4ead-9bea-e6bcec8046c5/miputinow.pdf
    • https://uploads.strikinglycdn.com/files/75faec0b-2274-48db-a4fc-32c92d135bb2/10771982182.pdf
    • https://uploads.strikinglycdn.com/files/f453e0f9-f347-4901-bc34-ff8df92c575f/miraculous_ladybug_season_1_download.pdf
    • https://s3.amazonaws.com/wupixufekijax/fossil_worksheets_elementary.pdf
    • https://uploads.strikinglycdn.com/files/d8cabeee-cc8c-44d1-9aed-db8510a64553/51600786343.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_off0000c747.bin
83a1492f1a70b4cca65dbb9ef2aa0d8f54829b91704e2f63ba1f0e3540f69527		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC747 5808 bytes
font_01_sfnt_off0000db37.bin
18e2dace1e7b03e3e6ebfeb4f4590ed8f1d3d2351d3125ed82c9737acc24ca42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB37 10788 bytes

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