Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d9801dffdbdba3…

MALICIOUS

PDF

48.5 KB Created: 2020-07-26 10:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07adfcb7b1ffeb7659339914c59e33b SHA-1: 57d8f1993633e0039b3082dd30aaa0f9c9d5d682 SHA-256: e7d9801dffdbdba3c05a6f68fa7ce972a5275efd49810f15d9a55eabf7651ea1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to a manual, suggesting a lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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.com/pify?keyword=climatizador+cadence+breeze+601+manual
    • http://files.bowcreekkennels.com/uploads/1/3/0/7/130775784/pesimifedutereba.pdf
    • http://files.juabsheriff.org/uploads/1/3/1/4/131437308/kowinise.pdf
    • http://files.ginapeakva.com/uploads/1/3/1/3/131379266/06d5b56058.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/76380239579.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/2776589471.pdf
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/95529831005.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/70202592568.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/wizobogalomomepaxuzizi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/58676431259.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/89017352202.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/vunuwijajubefir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/90355807875.pdf
    • https://cdn.shopify.com/s/files/1/0429/4659/2924/files/41557596336.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/bifanowa.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/
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/wizobogalomomepaxuzizi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000808f.bin
fb0372e405e39f29b6338b24c2d14e427d388611c3d4188860877579a7f4c7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x808F 5352 bytes
font_01_sfnt_off000092b3.bin
8bf4d8c8b79fe2d99e10c3af0223113e75b2da2947cb891511ca3ad7e43bc8c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 9988 bytes