Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6db9e43cdb46a…

MALICIOUS

PDF

47.1 KB Created: 2020-11-04 17:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8fe67a1baa51c55a6dbc3fa49f8df27 SHA-1: 0fc4c14aec7dc70c5835ea6b46a54bbeec168bf6 SHA-256: 08e6db9e43cdb46a89e9df77a8e0ff4ecc7d14fac7703220271cea2d52a74080
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness.

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.link/123?keyword=skeletal+system+diagram+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5f99484f7308f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870e8cf1182.pdfIn PDF document text
    • https://tuwijojax.weebly.com/uploads/1/3/4/4/134477229/128556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5f99ce9c76fa4.pdfIn PDF document text
    • https://visuzajekug.weebly.com/uploads/1/3/4/3/134305902/wekabukogikuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f86f556ca667.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/da957fba-ac12-41be-915f-510d47abda3b/winizutuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a671748-5c71-4402-8126-eb97c22023ce/maguwusoxivironojipubepoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79068082-06ad-4fbd-9180-c17e24ecb6bb/83672913972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09788912-067d-4ed4-a499-e07a416e0b3e/37874082617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e45e122-ea05-4946-8882-60669a2b1663/21346323114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbe2df33-6903-4f98-a97f-7d67f5a3f53c/ap_bio_chapter_14_reading_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0385/8077/files/ropelakojusenom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974fa624-42be-4f72-930c-140d7ea502f1/56292784643.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_off00007aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA8 5628 bytes
SHA-256: c10c7fcad5566b7d7496616c14e0dd571346e11bb8b05597cfbcd92f2ebeade6
font_01_sfnt_off00008dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC4 9876 bytes
SHA-256: 47a2903ef9664cc07acb7b8e39657f7f41590ec3a288f995a1e78348d5ce3ce0

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