Malicious PDF — malware analysis report

Static analysis result for SHA-256 75029733cf938d85…

MALICIOUS

PDF

33.7 KB Created: 2020-08-12 02:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7515cc42cc661d35104cc43530fca2f1 SHA-1: 73ed9041438fbc7919d52e9cbb29c744b2a62104 SHA-256: 75029733cf938d8552ecfd135ab0df84a6d5c01e5b462de616ff886ccf98e6a5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded artifacts suggest a lure for a 'crucial conversations participant toolkit', which is likely a social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=crucial+conversations+participant+toolkit+pdf
    • http://files.tinytownllc.com/uploads/1/3/1/6/131606368/waxesediruralen.pdf
    • http://sowadoben.iocsummerschoolexeter.org/uploads/1/3/0/9/130969352/radagisipe_limupe.pdf
    • http://files.hiddenwonders.co.uk/uploads/1/3/0/7/130738875/97a95c3d0b3.pdf
    • http://zinep.bybuck.com/uploads/1/3/0/7/130738970/6f7d40.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1635/4977/files/cancer_gastrico_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/63916604743.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/bermuda_triangle_book_in_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/systems_understanding_aid_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/40909805908.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/campbell_biology_in_focus_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/70735317393.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/45803650392.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/cold_formed_steel_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/fatizuleg.pdf
    • https://cdn.shopify.com/s/files/1/0440/0254/1726/files/libro_sobre_el_amor_propio.pdf
    • https://cdn.shopify.com/s/files/1/0432/5428/4450/files/30603006096.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/48104052967.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_off0000471b.bin
b882827ee7f48f456cba07f0a7f90a19d211a8f92aa1bcc7abd03951f8912cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x471B 5176 bytes
font_01_sfnt_off000058ca.bin
3c3bf176d01df76ca0d29fc51ac7a1e42c1b086af98fe35bb362acc96fe80638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 9636 bytes

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