Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2329d97ec744f47…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 06:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3624370b7c62387ddac72f84fe186c52 SHA-1: ce8095eaa65a592efe0e1b6d3a1ffb29e67bc2e3 SHA-256: c2329d97ec744f4725d1a3b617d59a99c4c7a4d7869ce9e47b7d0ff3ad0c3fd9
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with the primary link pointing to a redirector service (https://ttraff.cc/pify?keyword=estudio+descriptivo+de+corte+transversal+pdf). This suggests an attempt to obscure the final malicious destination, likely a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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=estudio+descriptivo+de+corte+transversal+pdf
    • http://files.tonihillkennedy.com/uploads/1/3/2/6/132695347/5532715.pdf
    • http://files.leopoldconst.com/uploads/1/3/1/6/131637562/5553908.pdf
    • http://domufi.nwtclo.org/uploads/1/3/1/3/131398020/jafod-magakor-xaseve-gezuzogiwuromo.pdf
    • http://files.cavgolf.com/uploads/1/3/1/4/131483201/salozovixun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/gizmo_calorimetry_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/59572515680.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/pawiradavitekisilomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/kalogijanavajizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/alphabet_phontique.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/bernard_lewis_middle_east.pdf
    • https://cdn.shopify.com/s/files/1/0435/7213/4049/files/runepiwefanigip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/fikonajosug.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/beruji.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/functional_programming_in_scala_paul_chiusano.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_off00006d27.bin
128025c3a7d7101f2a32bb850b5ebb109443f0cbcd16e7456ae944320aa00fac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D27 5164 bytes
font_01_sfnt_off00007ecc.bin
d7f3a42e2fd03f1968c0ec49d16d7cdad78a10bd13d4bdea6d9f3065a757823d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECC 11080 bytes