Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb2b396a8ba9a26…

MALICIOUS

PDF

45.9 KB Created: 2020-09-14 23:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9562555762110fe9357f9ad4b97df122 SHA-1: bcdefed09c105c0141cedefb9477803a226535bf SHA-256: 6cb2b396a8ba9a26c4b4c8049dee5081e8cccf5c8a562827c70387f872a261ba
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=we+stand+and+lift+our+hands', which is flagged as a malicious redirector. This suggests the document is part of a phishing campaign designed to redirect users to malicious sites.

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/pify?keyword=we+stand+and+lift+our+hands
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3ab5ed_f2f6c518000143abad2d5c210fa2fa74.pdf
    • https://static.usrfiles.com/ugd/6a7407_e0b3d95118ce4c4082f6645a1e050474.pdf
    • https://static.usrfiles.com/ugd/b4a829_9abfa0564e74468f8c7fc258c8cebe9b.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_673af17f1c014ee18763ca82539432e2.pdf
    • https://static.usrfiles.com/ugd/dcc11b_523205a2473347959e33bf0f9a5d6460.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/medical_report_sample_for_heart_disease.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/47655883568.pdf
    • https://static.usrfiles.com/ugd/f09a9d_3513f232f3d144c0bbb84b35bcaf29b4.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_6fe5313ccbac42a5a406a720e91a2e17.pdf
    • https://static.usrfiles.com/ugd/7f16bd_94a6fbf3b0434a8080d4812cc1cf32e2.pdf
    • https://static.usrfiles.com/ugd/50de67_a569fa73b8b44fedb92e9916961fb75b.pdf
    • https://static.usrfiles.com/ugd/aff7ca_41450687d7d14fa1a80eb20188bc338d.pdf
    • https://static.usrfiles.com/ugd/4c3ae3_fedbcdb6e415408b8a6f34c011b79a52.pdf
    • https://static.usrfiles.com/ugd/87b9a8_9474d6ba459342e888b0c49b838a83c1.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_9630af99774948fb8b424358be4c6a34.pdf
    • https://static.usrfiles.com/ugd/61b8bf_10d041ffa953463c9fc858845412bcb5.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e75.bin
ae1d1a13fb4dd2562d08382a4e3b865293e54159bf4f0b7b4603ff36706cbcc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E75 5008 bytes
font_01_sfnt_off00007f83.bin
e7ba1c2a1675aaec45a0ab5454fc01db09b3c3af6d2078b136de27f24f80f4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 13664 bytes

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