Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfbb63b8901b58f…

MALICIOUS

PDF

37.6 KB Created: 2020-09-07 00:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbe0b4fa6ef89002b7113e51b470472 SHA-1: 4f0fa3c7a9dd4a90e5b1b2de19f8132da14aaef9 SHA-256: 1bfbb63b8901b58f4a894cb4586d8d53fc55d66fc9d37ab85c88a94b26979522
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains a high number of embedded links, a technique often used in link farms for SEO manipulation or to obscure malicious destinations. One of these links, 'https://ttraff.me/wix?keyword=platform+peep+toe+lace+up+sandals', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure.

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.me/wix?keyword=platform+peep+toe+lace+up+sandals
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/kia_cerato_2012_manual_completo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/gakutadadilegidulexajelum.pdf
    • https://cdn.shopify.com/s/files/1/0436/9527/6187/files/76128058368.pdf
    • https://cdn.shopify.com/s/files/1/0457/9504/9638/files/jobok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/rotewedakezutiketikavez.pdf
    • https://static.usrfiles.com/ugd/956c05_84a5e29000bf4ac784d9820756de61fe.pdf
    • https://static.usrfiles.com/ugd/f0b6b3_03ba574b321f48a296114f0bd17df446.pdf
    • https://static.usrfiles.com/ugd/1df9ea_becc59ea6aac4aa7a45aa2898304bc60.pdf
    • https://static.usrfiles.com/ugd/a1fb72_7f9f3c07d2d3423f95d4bc2731988618.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8a124981949f4cc080039c1f4056f830.pdf
    • https://static.usrfiles.com/ugd/2f7815_7688b45060be47848cb4bddafcaa22c7.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/fivexowokijadezavalateli.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/37656665420.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/putogipazevipa.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000485c.bin
6bbff8d7f035c3cc65cb28b9e611c0f772198e49a153a3b75d13788676553cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x485C 5136 bytes
font_01_sfnt_off000059b2.bin
534c81e5bec678188ef2193395320fdb4c59b75d849d8f60a3e553e5fbe98f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x59B2 9980 bytes
font_02_sfnt_off00007bc1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 4324 bytes