Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee68a64eaa4d9ef…

MALICIOUS

PDF

75.1 KB Created: 2020-09-18 15:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b437ff33bf2bfaea1c3b934e1b256570 SHA-1: 76875b4b31bab28764f10bc1ecd9e9410ed0f3c2 SHA-256: 5ee68a64eaa4d9ef3e52ccd8109437fed9db9a9d6168f00aaaf0b6a069cb52c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, specifically disguised as a manual search result. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF links suggest a link farm or redirection scheme designed to lead users to potentially harmful content. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users.

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.club/wix?keyword=mamiya+rz67+ii+manual
    • http://poveli.classicalvintagerestorations.com/uploads/1/3/0/9/130969656/c770b.pdf
    • http://suregozo.altarpreneur.com/uploads/1/3/2/7/132710657/xekovut.pdf
    • http://files.cassandraarthur.com/uploads/1/3/2/7/132710624/3819004.pdf
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://43f94d00-82d9-4176-abfe-92fcd9bd931c.filesusr.com/ugd/05e3ad_dadcfa6f0cfc4251af1114ef01d55f63.pdf?index=true
    • https://de0ecee4-dd29-4146-8b8e-8d7e54b186e2.filesusr.com/ugd/a6e5e9_ed3368a56624426a9a448623b932ab3a.pdf?index=true
    • https://4d66fe85-8e5a-4c0f-9dde-b1bea476c869.filesusr.com/ugd/97aff7_3b1f97fc52be46e795f9451383986d44.pdf?index=true
    • https://0b9a0162-b984-452d-9d41-a400899af41f.filesusr.com/ugd/c722c2_c17acbb134524111bb089d10932ef209.pdf?index=true
    • https://7b85a6d9-4ffb-4635-b91e-42a48e2a0f8b.filesusr.com/ugd/45fd81_3decbad2062a4528b1755cd1c07f6782.pdf?index=true
    • https://466e0940-4c4e-4631-844e-f5b940361ad0.filesusr.com/ugd/23a6c3_3d3bca3ede0643e9baf4a39b693983ea.pdf?index=true
    • https://5794c76f-5b54-43c4-b023-b40918442f36.filesusr.com/ugd/436160_e6f9c6021309424c91f97b65067b6326.pdf?index=true
    • https://9533fe74-0966-4be1-8f69-428722eeb313.filesusr.com/ugd/5e5b2a_fdb9f95334e94a3e828b78aa17c61604.pdf?index=true
    • https://96a21613-0321-4306-857d-d00c17fd15ef.filesusr.com/ugd/65d6f7_d238bb1666c549d481bda476392638ca.pdf?index=true
    • https://78a0e36c-f002-42e7-853c-398456b373a9.filesusr.com/ugd/162fe6_ab4be519552f487b95cc754cb8a02146.pdf?index=true
    • https://54b6e866-33b5-4fff-b700-68334175a47d.filesusr.com/ugd/9904c2_1890c9d1d483431e9940b1aa858b6637.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e134.bin
9538e449e0cdd4ec138edff7b4791129c1203611690e6d0185ed2a0f5d510fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 5044 bytes
font_01_sfnt_off0000f260.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 1800 bytes
font_02_sfnt_off0000faee.bin
1d453d12a46476dfb2d88dc0c2ce70e6bd98bd9ee86ed8706ee2256622fd7532		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 10536 bytes

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