Malicious PDF — malware analysis report

Static analysis result for SHA-256 7607817abbf9c65d…

MALICIOUS

PDF

137.1 KB Created: 2020-08-31 05:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24b02a8904f598341a2bcbe6a07872ee SHA-1: 1ca200b41cfa39dcc4d403a4632481bdba55e1a4 SHA-256: 7607817abbf9c65df682bc251b1b96a977df9d21f6928d89657e630b7aff2648
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to `https://ttraff.com/wix?keyword=tincion+de+nissl`. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with `https://static.usrfiles.com/ugd/6d59ab_79e76fbf45234e439e6379316ff03f0f.pdf` being the first listed. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious or manipulative content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=tincion+de+nissl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6d59ab_79e76fbf45234e439e6379316ff03f0f.pdf
    • https://static.usrfiles.com/ugd/e3ff21_a81f8143e2fe47cd971fc5e77ad64368.pdf
    • https://static.usrfiles.com/ugd/b47706_a62c8823e8bb473598bea2cb5a218772.pdf
    • https://static.usrfiles.com/ugd/80c1db_48a3724dd20b413ba869cecc0bbe9928.pdf
    • https://static.usrfiles.com/ugd/136d07_8902276955fd4aed983fd7e42bbe8600.pdf
    • https://static.usrfiles.com/ugd/e1c37d_07114fe3a00a4e3aacc7d6f7fb29f842.pdf
    • https://static.usrfiles.com/ugd/c1de29_820cc30789e94eb8ac92fd81ea16a038.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/amabile_giusti_libros.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/32678454459.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/litix.pdf
    • https://static.usrfiles.com/ugd/4479ed_203a77ed9a9944b7ac8845382c7a8ea0.pdf
    • https://static.usrfiles.com/ugd/bb13a2_513971d2782041d7abaf1adc361bfed1.pdf
    • https://static.usrfiles.com/ugd/f84671_6193772cd8d94786a49ccb1f67b3d2a6.pdf
    • https://static.usrfiles.com/ugd/e32576_9316091cf2d54867bbb8d459f7512bfa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d145.bin
9c029f40504ecdb14fa0126bde5bb8fc4821e39a9874739bdfad15838f2cbdbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D145 4284 bytes
font_01_sfnt_off0001dfc9.bin
e060020bf830c25f43e424ce18c39f556095afa1d9d8eb7d0a3f8c6bfc1a41b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFC9 12756 bytes
font_02_sfnt_off000208e1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x208E1 4324 bytes

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