Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b11e7256077fa4…

MALICIOUS

PDF

47.1 KB Created: 2020-09-07 09:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6af0a7cf9287376995b5e2feb27aaf7 SHA-1: 1a57c2305bf35e85f55cbbdf87d0b832b935684f SHA-256: 09b11e7256077fa4f5a165a1081e0346c959ec9487ea3ae212d6642a63c8aae7
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, masquerading as a useful document. The ML classifier strongly indicates maliciousness. The embedded link is designed to trick users into clicking it, likely leading to a further stage of infection or phishing. The document body itself is heavily obfuscated and contains the malicious URL.

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/wix?keyword=blender+2.+8+hotkey+cheat+sheet
    • https://cheatography.com
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/nabukiriwezo.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/wagugekodofajelegubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/zadarifex.pdf
    • https://static.usrfiles.com/ugd/221f3a_8515f08153884205b28df354aca72fb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_211b042e00ef4f7db3cbe1061efb60dd.pdf
    • https://static.usrfiles.com/ugd/8716ab_e3c224e29aa74aca84fa0f8d5667be17.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/bewunig.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/50454966499.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/xunaxuzipuwedububowim.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/14842702446.pdf
    • https://cdn.shopify.com/s/files/1/0436/3183/7344/files/82116511445.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_off00006b93.bin
fe67d79fc2c9194e7072000b90072a58c8941d7ea75009fa4d574504eb59a39d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 5600 bytes
font_01_sfnt_off00007e9f.bin
e45914d257f3f7cdabadfc93d2e5110e34143e0672801500fbc5dd8eafba574b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9F 15636 bytes