Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b7b8cc62787366…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 07:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698b18b062c4994b99ecb18c12d463ef SHA-1: e33d3ef7995daf1c6fea5653d0fdee33f4bbcaf8 SHA-256: 15b7b8cc627873666c484f76e64cbbb8401acad72ad66fff5b52ae347a626d7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a known malicious redirector. This suggests the document is designed to lead users to malicious websites, likely as part of a phishing or malware distribution scheme.

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=media+writing+print+broadcast+and+public+relations+pdf
    • http://files.napervillebigbandjazzfestival.com/uploads/1/3/0/9/130969772/majijevupuref_giguranali.pdf
    • http://files.essentialblitz.com/uploads/1/3/1/4/131437736/xagen.pdf
    • http://files.harrisendofthetrailranch.com/uploads/1/3/1/4/131408738/julaziw-beturinis-pajolosedexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/81601909077.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/andrew_jackson_biography.pdf
    • https://cdn.shopify.com/s/files/1/0432/6922/6656/files/cours_d_anglais_dbutant_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/64363416903.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/lakiguguvosubuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/2241293980.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/sunataxesudilivuwifunoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/robakedulub.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/96765640651.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/87102143697.pdf
    • https://cdn.shopify.com/s/files/1/0434/2638/1975/files/tales_of_vesperia_warehouse.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_off00006735.bin
d04cadc4f5c2be9b0e83c4a21759c6afb6723ed309c4551107aa9e34dcec6b7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 5560 bytes
font_01_sfnt_off00007a48.bin
b1274920bc70760792ca5eba0670ae648179d5c66d1255e4afc86df811636762
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 10016 bytes