Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19a8bddcf471261…

MALICIOUS

PDF

45.2 KB Created: 2020-09-18 03:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef053e00d620150bbed1d6d80cca461f SHA-1: 4e3604bcc1cb01412ad296650935c8078fa364ab SHA-256: d19a8bddcf471261e555f25ecfe31bcb45e057bd2f1287c0776ca8f8089aaded
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains numerous embedded URLs. Several of these URLs point to known malicious redirector infrastructure or are part of a large link farm, suggesting a scheme to drive traffic to malicious sites. The document body, though heavily obfuscated, contains references to a book title and URLs, reinforcing the lure.

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/pify?keyword=just+mercy+book+pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://files.allthingsprettymarket.com/uploads/1/3/1/4/131438541/2057112.pdf
    • http://tasodibe.carolynfordart.com/uploads/1/3/2/6/132696194/kafexaloruruforutu.pdf
    • http://natuzum.greekcatcarefoundation.com/uploads/1/3/1/4/131406211/7229561.pdf
    • http://files.holidaymag.co.uk/uploads/1/3/0/9/130969054/parukifipikino-pemutowovigu-kogez.pdf
    • http://migixuza.teih.org/uploads/1/3/1/4/131407514/fumoweb-zetomesi-xakitozoxamu.pdf
    • http://files.sendbrandon.com/uploads/1/3/1/4/131453432/pijinixalifipumof.pdf
    • https://5b6249cf-c903-48f4-8773-c2d4f6499258.filesusr.com/ugd/de3d83_3452fda8a5f449cca404440acc5504b0.pdf?index=true
    • https://8d1ec6dd-67a3-4ca9-8ef5-092afbcd5ee6.filesusr.com/ugd/7603ae_05468dd291c54cd5979a52bd7ef39b15.pdf?index=true
    • https://e0a1f42e-1cfa-4273-b0e4-814d50112e07.filesusr.com/ugd/6260fe_3010d58a3d914546828a464b2dcaef64.pdf?index=true
    • https://9f173bc7-9daa-408a-8e71-ee4bc5e02795.filesusr.com/ugd/fd9558_3a675e0045e04d748f3d666911f76b7f.pdf?index=true
    • https://3d8576e5-7465-4a04-8012-2dd00f5a615a.filesusr.com/ugd/682d1c_5622abd2fec84cda8a51c9e40f3aa918.pdf?index=true
    • https://3bf08f42-125c-4cc7-8084-3e0dee925f5d.filesusr.com/ugd/0adedf_9608fcc42f60436c863bc7a0d9dbd6b0.pdf?index=true
    • https://320f0844-69b8-4d69-bed6-7dff4dcdeab3.filesusr.com/ugd/5af86b_ef2cb625ffc1412881a44ce831990af8.pdf?index=true
    • https://a24c2194-f9ad-4df6-a984-4640697db635.filesusr.com/ugd/0010c8_ee5d24ffa4cc4941ba54ed6b4a361147.pdf?index=true
    • https://6ba83510-2db4-480e-84e6-84dc02dd614c.filesusr.com/ugd/07e02c_220f0073ed2b41b0ac2d60a7f7c6922a.pdf?index=true
    • 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_off00007111.bin
1babd10b4082bbb4e95e20118b9d6b454a7d17bca3a4073cd929afd5c57b2c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 5356 bytes
font_01_sfnt_off0000833c.bin
e7eba0016a5f824bbf20549b65c63af905b7bd6626f4cf79633b3b948dd70eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 10768 bytes

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