Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e072fdc7f447e32…

MALICIOUS

PDF

42.6 KB Created: 2020-09-17 23:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010cdafc93bab0267457a64623a4fbd0 SHA-1: c26c861e6d296f3fe8015b649f5fddd1563f5457 SHA-256: 0e072fdc7f447e3259a087a360fc261ec469cf76ef4dc533d4ffb63a7c314880
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs that point to external resources. This suggests the primary function of the PDF is to redirect users to malicious sites, likely for further exploitation or phishing.

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=how+many+ounces+in+a+cup+coffee+maker
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f4ad1647-4c6c-4fb4-9525-635fcef8c3ad.filesusr.com/ugd/694d5d_0b11c09bea214ff49b6492409f32eebf.pdf?index=true
    • https://901d00da-6a8d-47b7-909d-7bf29ca51cd2.filesusr.com/ugd/eaf48f_d1d37f66287343dbaf7f07d1bea619e1.pdf?index=true
    • https://bce42d04-672c-4f99-a214-822bb3acca77.filesusr.com/ugd/c57cae_f14112b278e34403985cae7407be8557.pdf?index=true
    • https://11deb748-ee4c-46d9-901d-49daba09e981.filesusr.com/ugd/738632_b8d3e00cd25443b5852c656765e7b9f9.pdf?index=true
    • https://c4262956-8fe0-4d2d-b88e-b26f50d1e1f2.filesusr.com/ugd/33ab24_cd8a80e04c31465b938691bbfb89bfdf.pdf?index=true
    • https://83d39262-d23d-43da-b831-04775b0d6c65.filesusr.com/ugd/eb6612_23ffb5eb355a4ec1b471ddbfe70ef926.pdf?index=true
    • https://730dba3e-ba85-4770-aa5f-07f8c4028397.filesusr.com/ugd/370ea2_e465958d73dd479b9299da5bf7d29c24.pdf?index=true
    • https://3815b6b7-033a-45e9-8b60-d9bc02a75431.filesusr.com/ugd/7be1cd_62d04c9ffa27401a8aec8e4607a8d64a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/tv_listings_19711.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/31312830676.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/39466407396.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2931/files/91226431049.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/simple_presentation_outline_template.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_off000067e7.bin
52e337071d561a67438b978e674ad52116fb0a9b23d31e9120f21252a91721d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E7 5348 bytes
font_01_sfnt_off00007a1d.bin
d3cc54f9f26c77a62835d3719881321643c5d2f96e49c254d7e0cc1ae4d02c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1D 10300 bytes

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