Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6c617898d1c81a…

MALICIOUS

PDF

56.4 KB Created: 2020-08-30 19:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52971ad96dd885a02db75295f6940c3 SHA-1: 67c8cbe898697dddf3f1404b695df02bf2a5f80e SHA-256: bc6c617898d1c81a234d21be42c68d80f334fa38c0372b890ce99cbb2f39fb2c
152 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, likely as part of a phishing or scam campaign. The document body and embedded links suggest a lure related to a 'sonicwall tz 205 manual pdf', aiming to trick users into clicking the malicious URL. The presence of a large number of external PDF links also indicates a potential SEO poisoning or link farm tactic.

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.ru/wix?keyword=sonicwall+tz+205+manual+pdf
    • https://static.usrfiles.com/ugd/b8c837_fe456af74b504046ba3d4ce835a781ba.pdf
    • https://static.usrfiles.com/ugd/271e65_94057ab5f61a49c28db8171fab71d87f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b224d8e76dea45cda904ec41700dd946.pdf
    • https://static.usrfiles.com/ugd/bfbc46_615e70af818246c4a5999f8632542bdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/xurapitomegafovinag.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/zojafozamovonub.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2e86cd413ae45dab10e03ad0104040a.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e9a429be1e4763a90f3b4f09320ff2.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/yard_sale_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/26159724976.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080a1.bin
18b54f4a732dea8ff4fd598462e78eb81c2dafa47d9cf414866194a919ba8f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A1 5436 bytes
font_01_sfnt_off00009310.bin
ac80200c233916e48506acbe38806f2f05f2f32ae8d95edfd3ae48e2e8dd6b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9310 17052 bytes
font_02_sfnt_off0000c750.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 4324 bytes

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