Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d07e9bb9e572959…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 17:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5c37d9df46e07462d157f3faf96f7d SHA-1: 7c3ba1866e536de7b82aef6c6d16c3b61b0a63a2 SHA-256: 4d07e9bb9e57295987255023cc23bf491b12867e1094da2b82f18aeb072237c8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. The primary malicious IOC is the redirector URL.

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.com/wix?keyword=financial+markets+and+institutions+7
    • https://static.usrfiles.com/ugd/b8c837_ef403b0c606d477e9fae24e17ab10a88.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea41ad8af7544b85a84fa16b69343393.pdf
    • https://static.usrfiles.com/ugd/b7ab08_cff1dbee517d4857b418c164bcdb78bc.pdf
    • https://static.usrfiles.com/ugd/f84671_d290351baa2c43b4857dca48ccfc8296.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/70729878689.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/31002460161.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd678c7ef524c07bc309c103da931d5.pdf
    • https://static.usrfiles.com/ugd/0a593f_8c44888040714fb0836024f009dda0a0.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_be949c50172440b484618bb041677e62.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_03c232b0fb16413d8b706ca0e5397ad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8de2c3f5a3e14d688bca221f8f91ed6d.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_off0000527d.bin
54505294d95977bcf7d4b2d5bab00c193865387ac6f6394d91ae9a4f52bf9013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x527D 5184 bytes
font_01_sfnt_off00006406.bin
1bd083f99db26d986577ddc3aeada8b6f9955f43ce494a27f07dd95df3f4f2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 10208 bytes

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