Malicious PDF — malware analysis report

Static analysis result for SHA-256 175a33a14eea8f87…

MALICIOUS

PDF

51.7 KB Created: 2020-08-16 15:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723a19bf45313463b23db2e087b0ef5f SHA-1: 5bdf1d4084ab12082b2f6c3965b33740fd9121a3 SHA-256: 175a33a14eea8f87663e5ad6d7d83fae78c8cba3d8ce61f6d34c5edd6833ffa4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=arifureta+light+novel+english'. The document body and embedded links suggest a link farm or redirection scheme designed to lead users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=arifureta+light+novel+english
    • http://zeferi.driver-guider.co.uk/uploads/1/3/1/4/131452839/terenaxusizixejo.pdf
    • http://files.guardianfineart.com/uploads/1/3/1/6/131606198/9fc88d3fb6.pdf
    • http://files.cookschoicehoney.com/uploads/1/3/1/4/131438188/kodizaka-sererub-rinirazozavajo-judivonodaze.pdf
    • http://files.kypdx.org/uploads/1/3/0/7/130739895/05151fe7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/60736405495.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/75023155519.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/84862309867.pdf
    • http://jipen.selmis-llc.square.site/uploads/1/3/2/7/132740285/gorurudekavawikojawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/laxebagixepasizowogub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/busch_gardens_tampa_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/4206/9918/files/nursery_rhymes_kid_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/vumur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1126/files/42971976692.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075d1.bin
20eb2cbe9fea0ceb88fe331353531d3cd4049af188afdba6dd94ae2c11347f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D1 6372 bytes
font_01_sfnt_off00008bb8.bin
c63f78448559238aa908e869dc6c0ad3e3e5e218edb0bf3915618c613636b4d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB8 5080 bytes
font_02_sfnt_off00009d01.bin
3032c8448a6de4e56c674ccd7536cad9da7cc1f56996652b8ec897cba72b0cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D01 10304 bytes