Malicious PDF — malware analysis report

Static analysis result for SHA-256 25266934d6ea1d43…

MALICIOUS

PDF

39.6 KB Created: 2020-09-23 23:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f062b181f59c75f24217b1be9d44479 SHA-1: 7fcf6ca63404e929a5eb1a4b351c1c8da884c706 SHA-256: 25266934d6ea1d431795173619fef52d148d32803b9c0a2582946a4c59f352c0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high density of external links, many pointing to suspicious domains, and one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'writing hooks worksheet pdf' and includes multiple URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

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/wix?keyword=writing+hooks+worksheet+pdf
    • http://wudix.nextleadershipacademy.org/uploads/1/3/0/7/130776279/4929797.pdf
    • http://femanolu.atadepaboutique.com/uploads/1/3/2/7/132712109/64451f164067dfa.pdf
    • http://bafino.voluntarynomad.com/uploads/1/3/1/0/131070450/1d6de3bc33.pdf
    • http://files.saintwindowcleaningcornwall.co.uk/uploads/1/3/2/8/132815015/4463387.pdf
    • http://pijip.howardhackneyimages.com/uploads/1/3/0/8/130813372/gafidesopolevovidixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://da9ea9fb-51a7-4b8d-b161-1a0cb3755489.filesusr.com/ugd/a107db_2e46c614aa814a9b8640b89e9fef829a.pdf?index=true
    • https://2351e442-3723-4b3f-825c-a1fbc13f988e.filesusr.com/ugd/90661f_ef17a994cf27465195a1d15aed787552.pdf?index=true
    • https://8ae03ea9-e97b-4993-a489-955a91156003.filesusr.com/ugd/f55bec_2a7343643bdf44cebb2c3dc8d1ec9ac7.pdf?index=true
    • https://c5cbb2e1-1bcf-4808-bfff-471a3bc53159.filesusr.com/ugd/eaf48f_36b7262c89e94f4fa0b7227a0d3858e4.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/87254847431.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/brownsburg_in_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/sky_talk_answerphone_service.pdf
    • https://cdn.shopify.com/s/files/1/0477/6414/4284/files/pilijon.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_off00005cd3.bin
61a7c111d07a51802edb25e175de88b1151cff650c2c549d0047960ccfe71f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 5228 bytes
font_01_sfnt_off00006eb9.bin
ef13e37a3ba8d4f992dc8097ad990e7acb28b2b94b44a0a506a25c720013149a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB9 10180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.