Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3c3f2cf020a85a…

MALICIOUS

PDF

53.2 KB Created: 2020-08-14 09:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0fc6188d6fe791a08a0b701a86b3e2a SHA-1: 35b1b2fd01f6e4ada5edfb886c2c62c100487ca9 SHA-256: 7e3c3f2cf020a85ad927dfb0fc21dff2603989c8867c8ea3daf2d8b18a03e0bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a 'company group structure chart template'. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content. The PDF also hosts a large number of external links, many pointing to Shopify domains, which is characteristic of SEO poisoning or link farm tactics to improve search engine ranking for malicious sites. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy strongly indicate a malicious intent.

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=company+group+structure+chart+template
    • http://files.employmentcollaborative.com/uploads/1/3/1/4/131437041/gatulusor_gitus_liludazizod_dodati.pdf
    • http://files.gembalina.com/uploads/1/3/1/8/131856034/kisokes.pdf
    • http://zivabopen.hillsofnotts.com/uploads/1/3/1/3/131380930/mejeritu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/teoria_funcionalista_del_delito.pdf
    • https://cdn.shopify.com/s/files/1/0434/7949/8918/files/ensayo_de_logistica_y_cadena_de_suministro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/vasejobedigadopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/84664471240.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/motoliwetisebitenusiluva.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/99271586982.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/kudoda.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/xetilikijilako.pdf
    • https://cdn.shopify.com/s/files/1/0439/0433/6040/files/descriptive_text_exercise_for_junior_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/manualidades_para_nios_de_3_a_5_aos.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/butufomazopebodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/giduda.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092d8.bin
07e86b90ed969e2a93a89747f33d92e0ac8c8a3c12521ed8e8593eded67493a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D8 5352 bytes
font_01_sfnt_off0000a4e3.bin
73ad2e8082e6babb0e0fcfdbbec186ba9f8f2db6f977b894a7e54002052fb839		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E3 10304 bytes

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