Malicious PDF — malware analysis report

Static analysis result for SHA-256 73df925da1bcd33c…

MALICIOUS

PDF

41.9 KB Created: 2020-11-03 02:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bf579ee8d82641e63978be4648c31e13 SHA-1: 17b5ef29a2cdcd05a1cde47b02f34e02fed9576a SHA-256: 73df925da1bcd33c33f661bed165218fee03163d680ae538ed64bbaad25633b3
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ggtraff.ru/aws?keyword=read+memoirs+of+a+geisha+online+free`. The document body, though heavily obfuscated, contains references to this URL, suggesting it is the primary lure. The ML classifier also flagged this PDF as malicious with high confidence.

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/aws?keyword=read+memoirs+of+a+geisha+online+free In PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/7847442.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/5c37f1e2591.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/a0c7feba-18ad-41fc-88f4-19e8e268c7e1/bmw_x5_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9328/4782/files/childs_history_of_england.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8482da08-09b3-4a03-a1a2-bfdc821fe1cf/78303903891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7cd79e-a357-487a-b184-fa4b822587d7/26301611837.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/causes_of_mental_disorder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf1f0c-3746-4343-8d86-340f5fa7f738/82087613903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b175646-22db-4c71-9710-e1d9f722d3e9/51231447243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab798e2-daa2-43f0-95eb-e5cf5ef922c1/29826419711.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_off0000655f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 5328 bytes
SHA-256: b6c20a73a39b2b9b1913267411a2a8d4a850a467ccab151efc0067b910859ae3
font_01_sfnt_off0000775c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 10516 bytes
SHA-256: 9cd637cad65001d93bcfbd904e9bfd22688bd57c047279f244b3f66d008db394