Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a0308f7eea95b0…

MALICIOUS

PDF

81.7 KB Created: 2020-11-24 17:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f39e39725fb0e9d681c260187d7bf4e8 SHA-1: 7839e4bed2368fc05b34149b68c835e9cbff08a2 SHA-256: 70a0308f7eea95b00e3254dac3d40cd9294310585a9ee203e70844cd65733b0a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The embedded URL is likely used to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=brachial+plexus+ppt
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5f9a78d700bac.pdf
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/d9c3cef6.pdf
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fadebc45a625.pdf
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5fa9d098c280e.pdf
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5f9d34678daaa.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdf
    • https://futuziduxe.weebly.com/uploads/1/3/4/5/134508203/2625633.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87659689cb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3adb463-e2c7-4b6f-831c-06d736660a20/dordinateur_concept_youtube.pdf
    • https://s3.amazonaws.com/jufowokedunod/tagobavij.pdf
    • https://uploads.strikinglycdn.com/files/057b41d2-82af-4963-8a9e-676717b87610/8983275207.pdf
    • https://s3.amazonaws.com/dobesogum/cracking_codes_with_python_free.pdf
    • https://uploads.strikinglycdn.com/files/23616031-7da4-4e46-b8fb-309409342cdf/ruxowuxopukimitesosofo.pdf
    • https://uploads.strikinglycdn.com/files/c05bbdfc-5aac-468a-b656-636c1e2d60bf/badivitunibaxopin.pdf
    • https://s3.amazonaws.com/dotivaf/volos_guide_to_monsters_kobolds.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_off0001059a.bin
6bffa9578cdd65f4ac2b57f16818a04633e91698038d9c5c77732ec7db42e09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 5140 bytes
font_01_sfnt_off00011711.bin
5ff12b5798833c7c7ea092326b8ae84aa39472dda84ef323a0ebdc140560dc65
pdf-font-stream PDF embedded font (sfnt) at offset 0x11711 10308 bytes