Malicious PDF — malware analysis report

Static analysis result for SHA-256 df91d8c229f96d7b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-27 19:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df00a2482fa6fed6fc21873ef3d59afe SHA-1: e6746740d30ef5ec07f59079794c1dc516be3617 SHA-256: df91d8c229f96d7bd91110a97586ab63731e48a243325c5cc4562ce425ab37a8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on 'cdn.shopify.com' and various other domains, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via a deceptive link.

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.com/pify?keyword=pathfinder+kingmaker+aldori+swordlord+build
    • http://xevufuw.eleanor-e-books.net/uploads/1/3/1/3/131398134/pugilijogurijemed.pdf
    • http://jorapanir.pinsnpotions.com.au/uploads/1/3/2/8/132814930/943d953.pdf
    • http://files.supportwestpotomac.com/uploads/1/3/0/9/130969772/f57eb6fa2a.pdf
    • http://falez.cibolocityballet.com/uploads/1/3/0/8/130874631/1578358.pdf
    • http://xejelazov.klamathforestestates4rma.org/uploads/1/3/1/0/131070588/sawubuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5565/files/attitudinal_brand_loyalty.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/synergy_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/juxopinomutezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/makoruwumurerozipi.pdf
    • https://cdn.shopify.com/s/files/1/0446/6917/3923/files/business_law_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/curriculum_development_book_by_purita_bilbao.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3313/files/inotropic_drugs_and_their_uses_in_critical_care.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/13006988933.pdf
    • https://cdn.shopify.com/s/files/1/0440/3000/1302/files/descargar_libros_cristianos_gratis_para_jovenes.pdf
    • https://cdn.shopify.com/s/files/1/0448/9301/2123/files/pdf_encyclopedia_of_mathematics.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_off0000698b.bin
dda540a0b3b1791886380eead9f9eadb16d16e61cd1896fd82158cd1108f15b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698B 5620 bytes
font_01_sfnt_off00007c84.bin
8f580ff47ed73be93b46aae80bbf28e42552e3ea70db916d481d139dc25dd48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C84 10112 bytes

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