Malicious PDF — malware analysis report

Static analysis result for SHA-256 6216ee88b5bc063b…

MALICIOUS

PDF

33.4 KB Created: 2020-08-31 01:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda68e57c53903fea92296de918ab510 SHA-1: 17fd0697638167b4094101fddb1f0b0439fd13ce SHA-256: 6216ee88b5bc063bb85c70d6cbc614a5edbf51b06a12268ace5ac7b5b412bd2a
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as sheet music, which is a common lure for phishing attacks. This link redirects to a known malicious domain, indicating a high likelihood of malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=schindler%2527s+list+violin+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezaneseku.pdf
    • https://cdn.shopify.com/s/files/1/0449/4747/2552/files/asthma_medications_chart.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/equine_acute_abdomen.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/partial_and_general_equilibrium_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/18079569538.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/33680839003.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/92819584921.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/jatedusefafalazanawazixuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/76546361255.pdf
    • https://cdn.shopify.com/s/files/1/0429/1038/4295/files/17996102162.pdf
    • https://static.usrfiles.com/ugd/d1c05f_8c98e16aec07458fa5eba5196969090c.pdf
    • https://static.usrfiles.com/ugd/3f4b99_a21050e00fe94e7d8874b992b1982983.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_off00004522.bin
8692f83174cf16a2b7fc4ff7c64db14f1b33bba6b524106ed823234c5a2a2042
pdf-font-stream PDF embedded font (sfnt) at offset 0x4522 5164 bytes
font_01_sfnt_off00005687.bin
73bab033f83477c000fe4c9a4fbca1607862dc746edb67b088ac46089d46ead6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5687 10152 bytes