Malicious PDF — malware analysis report

Static analysis result for SHA-256 1759ce80c29582d7…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 06:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 497e075337bd3d79ba4cf36b075f5096 SHA-1: ea8ff67c348d7171a6f906eda382bee6e2e8e8f2 SHA-256: 1759ce80c29582d70dbdde7038878ae929f5578f2d6f24fc000b289d15e1d728
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. While no scripts were extracted, the presence of embedded URLs and the heuristic firings strongly indicate a malicious intent to redirect the user to harmful infrastructure.

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.cc/pify?keyword=the+apology+of+socrates+pdf
    • http://files.klineglazeservice.com/uploads/1/3/0/7/130775916/motunaxujotudat.pdf
    • http://files.renaissancevitality.com/uploads/1/3/2/6/132683014/jefuzop_zegilunaligep.pdf
    • http://bikixaba.mpspto.com/uploads/1/3/2/6/132696212/xerujodatajopol-kuzol-rawubeginaw-xiduzedon.pdf
    • http://files.dirtyharryserotics.com/uploads/1/3/1/0/131069819/8a5670.pdf
    • http://files.cork49gv.com/uploads/1/3/0/7/130775350/7871081.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5382/5694/files/83245584911.pdf
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/minecraft_crash_log.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1384/files/kogebavogimuzidumomaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/ginukiruranerevok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/75690967976.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/25115588407.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/three_column_cash_book_examples.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/como_crear_base_de_datos_en_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/wujeseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/jurnal_kista_endometriosis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/tuberculosis_diagnosis.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_off00006e1d.bin
2cb5e8b6f7cc73df48813a85a097e0ff762bc8350a45b91a1e72a6a60ee460d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 5468 bytes
font_01_sfnt_off000080c1.bin
ba7604520ae8cfaf5a47bdb8cb1790c7676302bf4b638a5ab23c2665bee62842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C1 10268 bytes

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