Malicious PDF — malware analysis report

Static analysis result for SHA-256 230d4df7cb1ac997…

MALICIOUS

PDF

49.5 KB Created: 2020-11-05 01:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fc31b868a7aa07899f200eef70ea3739 SHA-1: 798bc05207e929df7d6ece1b05ad9dd1e539096c SHA-256: 230d4df7cb1ac997524f501b71d0da71188a0d884fd7a96710d2d624f3f3c94d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, with heuristics indicating it's a link farm designed to redirect users. One of the embedded URLs, 'https://ttraff.cc/123?keyword=alliance+crusader+location', is flagged as belonging to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.cc/123?keyword=alliance+crusader+location In PDF document text
    • https://zutofamofiselas.weebly.com/uploads/1/3/4/0/134040676/9933360.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/1197294.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/fefumuduxogino.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/c42ef149-0e0b-4d03-8e46-0905c5792506/sevefupatirerej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57cea32-ae5c-4649-afc1-0ba0b5375cfc/gemovos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d7e9bb-1537-4d30-8666-0e1eda1018ce/23229847903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12e6d9f-bbd0-47da-9ff8-aee0d58a2651/jitopokujisadet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e80c054-a827-4651-97ed-2180491810d2/tosinobosavodaxawetip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b80d15-50b6-4036-bdcc-b7fc799b937b/how_old_was_jacob_when_he_died_kjv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18476851-00fa-4880-82ae-95ff1c50ec97/84337422648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded82a9b-5b75-4d88-ad00-35fc5a832f8b/92751193176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0abaaaaa-e6fb-45d3-80eb-58fa187cb26f/tusugopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728db570-9481-43c6-b3b3-297da9d5681e/19454744995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350fc66e-c2e6-463e-8410-acb9e2762aa0/49417651802.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_off0000834d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834D 4924 bytes
SHA-256: 5ef4b23a2e25b9472dde3ba334c2b1e164a6fa2e78381828046082bf0a571557
font_01_sfnt_off00009415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9415 10868 bytes
SHA-256: 507ae5abee6d4349d41113ff61137eb4c45de8b135f315a490ed0fec6e6d7a6f

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