Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f3e047302b071e…

MALICIOUS

PDF

45.5 KB Created: 2020-09-03 14:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9314b0dabfff8948b68c575137c45c SHA-1: a1feec940fea74f5f6fa3c187131dd4959bf264e SHA-256: 83f3e047302b071eb9ab726dffea0477e72d832a11382621d46a6980a6aa93f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary malicious objective. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=best+offline+personal+assistant+app+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2217/0787/files/583779389.pdf
    • https://cdn.shopify.com/s/files/1/0429/2260/6759/files/el_negocio_de_bienes_raices_en_mexico_libro.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/xelasilajuvuwojaja.pdf
    • https://cdn.shopify.com/s/files/1/0461/6791/6696/files/68294314741.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/25919395892.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/tegoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/wulufaw.pdf
    • https://cdn.shopify.com/s/files/1/0461/5513/7187/files/dinamenoxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/psychology_of_colour_in_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0435/1030/0831/files/89262832559.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/vudafapozapotaras.pdf
    • https://cdn.shopify.com/s/files/1/0438/6275/3445/files/graphicriver_resume_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/dracula_study_guide.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_off00007450.bin
205fe7053ef25fcbc7715d87460de3e3ba34ed0bf2c996f24bddd60d683bd998
pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 5084 bytes
font_01_sfnt_off000085ac.bin
9349ec4b81b84f5cbd1a1d1e187d568fe7671f3bd66a6e585d3108c9b0183cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AC 10216 bytes