Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce86c2fdd4a2cf7a…

MALICIOUS

PDF

34.9 KB Created: 2020-09-17 05:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1098a934117c53bb5ae1702eb118daf4 SHA-1: 680b0a64eef8f5b555ebfde2f93586ede5051dac SHA-256: ce86c2fdd4a2cf7a99e00f29ed3e91024ed9ad9c3cc9068ad4d91468b58c400a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though partially corrupted, includes text related to 'fishing clash hack pearls' and embedded URLs, suggesting a lure to phishing or scam content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.me/wix?keyword=fishing+clash+hack+pearls
    • http://fedovev.realestate-stlucia.com/uploads/1/3/1/4/131405965/5500528.pdf
    • http://files.ashiharakaratesg.com/uploads/1/3/1/3/131382955/429ee752e8.pdf
    • http://files.whitelabelbridal.com/uploads/1/3/1/8/131872178/valurevelasaro-wawunutoruwen-jexevufunim-pizajujodarijum.pdf
    • http://dasota.pauladuartetango.com/uploads/1/3/1/6/131637814/fc787047c288.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/who_guidelines_for_treatment_of_cerebral_malaria.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/dorijareximizoxegufakot.pdf
    • https://7914ff4b-b3a7-48ef-9261-53800f48d225.filesusr.com/ugd/76156b_49b16db652314577b8f814aa876f3a55.pdf?index=true
    • https://4d47e975-3e16-4bfe-b5b4-c18048a34f8f.filesusr.com/ugd/97aff7_50728bbb62424aaaaf90536502d70b77.pdf?index=true
    • https://488e3b2e-f2a5-4dce-8360-541f9a81e460.filesusr.com/ugd/0adedf_4851f9983f3b4e11b5f99d89da55be36.pdf?index=true
    • https://8fd0fe30-ac7b-4922-a690-6cba6fde4217.filesusr.com/ugd/5926b4_d82b9afa8d014e059b71a7d3ea2ab533.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/rubber_sole_sheet_suppliers_in_mumbai.pdf
    • https://cdn.shopify.com/s/files/1/0440/2393/9237/files/wuregokifanisuxebekepog.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cfd.bin
0bea3cc41f60440835d7c7c5d63657ab5bc3127dea6051609f3dee6e6603da26
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CFD 5212 bytes
font_01_sfnt_off00005ec0.bin
466f6da56bbcb561175315646ff5c4836ad87ec916e6c75c467cf84da33b660e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC0 9532 bytes