Malicious PDF — malware analysis report

Static analysis result for SHA-256 949792198b0b92af…

MALICIOUS

PDF

33.7 KB Created: 2020-08-19 21:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d38f4071de78f3cb3e53a790c8cddab SHA-1: 3fa9843aaaf1f10986a3b0d954d3434c9eda8e62 SHA-256: 949792198b0b92afb7adf9c5f0c993d19ebf1d28794163763910633dffc4d2d8
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as educational resources, but the primary link redirects to malicious infrastructure. The embedded URL https://ttraff.cc/pify?keyword=igcse+edexcel+maths+past+papers+answers is a known malicious redirector. This suggests the document is a lure to redirect users to potentially harmful content.

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=igcse+edexcel+maths+past+papers+answers
    • http://files.thehandmadehydrangea.com/uploads/1/3/0/7/130739294/gekitukijedip_masexirokodabux_lowiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2264/5408/files/business_mathematics_notes_1st_year.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/76875928676.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/73754255539.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/buxoxuneve.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/wapaxutuwetedigedotivo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/labview_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/descargar_biblia_de_estudio_diario_vivir_reina_valera_1960.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/63372788479.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/xojapebes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/bloom_s_taxonomy_cognitive_domain.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/83053959547.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/kasabonizox.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/biochar_journal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5760/files/13313952155.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_off0000457c.bin
58204c06a57c80f3ceadad2f289541583e7635dcdfa1d84b41db7ff14a2a4407
pdf-font-stream PDF embedded font (sfnt) at offset 0x457C 5584 bytes
font_01_sfnt_off00005869.bin
c8c751ae37ae0c23c1fbe4d2998691e64a25d2e4cc4819fc0f2ad479eb55c775
pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 9784 bytes