Malicious PDF — malware analysis report

Static analysis result for SHA-256 75537241ec29d009…

MALICIOUS

PDF

49.0 KB Created: 2020-08-15 03:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed0d190af0ee4142c191780f5d1d1c3 SHA-1: c3b8fb4d11059a585861531594817070d3737ad4 SHA-256: 75537241ec29d009b8a2492c7f705bc5fe83221a6802ae86bf9f5297a885898d
162 Risk Score

Malware Insights

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

The PDF contains a deceptive link that redirects to a malicious URL, likely to download a secondary payload. The document body and heuristics indicate a social engineering lure, presenting itself as a download for 'Baretail for windows server 2012'. The presence of numerous external PDF links further suggests a link farm or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=baretail+for+windows+server+2012
    • http://files.apexmartialartsgainesville.com/uploads/1/3/1/6/131636927/c5b210a6c3.pdf
    • http://files.pawsitiveparenting.com/uploads/1/3/1/4/131408353/1215844d.pdf
    • http://files.lisbonfallsnazarene.com/uploads/1/3/0/9/130969148/lerukenufe_wudafowapa_wipizop.pdf
    • http://files.awananet.org/uploads/1/3/1/4/131453278/radorolerateb-volukon.pdf
    • http://voxexat.acds-clsa.com/uploads/1/3/1/4/131406149/7601b0cfcc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8683/2035/files/aws_certified_solutions_architect_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9833/files/4054192048.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/tepevijekitidoperal.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/77498337204.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/fasemamujud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/2008_saturn_vue_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0448/5450/9729/files/mastering_autocad_civil_3d_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5519/files/58040842474.pdf
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/pejezokipiravosowidisow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/zuneponogijo.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_off00007ff0.bin
34ffa4467544331198071b4b279d45d7cc5ae2533899f19fb7885a479c6d9674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 5428 bytes
font_01_sfnt_off00009290.bin
a0a7c7b45bd212a135d04f10405b44c01fd18031f0f8b05e7e45205ca979ff87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 10748 bytes

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