Malicious PDF — malware analysis report

Static analysis result for SHA-256 09569879334621de…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 20:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30eb5e36bd7dd5b1b448bd5cf1f0310d SHA-1: 952869e29a016a1ab9addb9d4e94e48bba557b5b SHA-256: 09569879334621defcf44288bfc9683b37683584e19d60e0971daba7bd3539e8
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body also contains text related to PDF manipulation and a call-to-action button, suggesting a lure for users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=split+merge+pdf+freeware
    • http://zewevif.booksandspoons.com/uploads/1/3/2/6/132695471/rupukur.pdf
    • http://files.azhealthpath.com/uploads/1/3/2/8/132815206/4a224374a65862.pdf
    • http://files.uofttalks.ca/uploads/1/3/2/6/132681164/6e39db585.pdf
    • http://jumel.theprincessandthec.com/uploads/1/3/1/4/131407797/728303506e92.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2870/7485/files/acls_precourse_rhythm_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/33062506228.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/51737440778.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/73210717947.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/jebojafunomidazos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/migofifafilari.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/koxapuwanekizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/degoxasekumezimobiwekave.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/41717051029.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/lugubidagixomaduv.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/83530262050.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_off00005dab.bin
fa2c9a4e87f16d7b7a3fce66c50c2d950b78be986b3b1ad2d67d695de724ed98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 5376 bytes
font_01_sfnt_off00006ff0.bin
e8523f7d41732aae2318f78dc1254aaff48b97a0c883ad12a8c60fbf9ab98b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 10884 bytes

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