Malicious PDF — malware analysis report

Static analysis result for SHA-256 024e565e8c4c2dd6…

MALICIOUS

PDF

43.7 KB Created: 2020-09-11 00:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028dc9f33b38768523eae8e4b66845b6 SHA-1: 5a61f3b109508f83daea15d3d88dbed3f35168e5 SHA-256: 024e565e8c4c2dd631008fdf4da2628220f774d6fe69157f0cf0dec5d6ad3f04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the target URL and other URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicates 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.link/pify?keyword=guided+red+deer+hunts+australia
    • http://melajezi.vbrea.org/uploads/1/3/0/9/130969373/sojekexusu.pdf
    • http://files.tacomateasandherbs.com/uploads/1/3/0/8/130814907/jinalameruvuwibisi.pdf
    • http://gazazi.hgpo.org/uploads/1/3/1/0/131070705/vasuwox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bc4951_90052346fee54ae6b58eb0467f4524e5.pdf
    • https://static.usrfiles.com/ugd/badafb_9646b09113314ae6bf7a26cc83c539cc.pdf
    • https://static.usrfiles.com/ugd/5c7528_eef42357633c4ef7a088b7b548a5cd1f.pdf
    • https://cdn.shopify.com/s/files/1/0428/1139/2167/files/bhakti_song_ka_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/dumaxositelidajesejepoto.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/alluvial_deposits.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/42671497337.pdf
    • https://cdn.shopify.com/s/files/1/0430/7864/7957/files/732188106.pdf
    • https://cdn.shopify.com/s/files/1/0428/4986/1791/files/probability_and_statistical_inference_9th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/24957415166.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_off00006c4a.bin
4689312af9a3fbdba13199c92a657a8116502f6a633b4d5a5f4b9187cf6892f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 4944 bytes
font_01_sfnt_off00007d0b.bin
b2bae11dfd78fdc6ea5ed7582433e61b1b2bd420d144b53e64abd275206a2794
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 10796 bytes