Malicious PDF — malware analysis report

Static analysis result for SHA-256 98952eb1d622ae27…

MALICIOUS

PDF

37.3 KB Created: 2020-07-31 13:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df3c39c46c1dab2b524c86d807c41460 SHA-1: 48f3be0ef0100ca2cf2a1d9b43b8792da56992d7 SHA-256: 98952eb1d622ae2796a88caa99f3f38d4870597093237c426ff11610a3368dd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger network designed to artificially boost search engine rankings, likely to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=model+aircraft+aerodynamics+martin+simons+pdf+download
    • http://files.homeandhope.net/uploads/1/3/1/8/131860204/kovumine-lisanuj-gikidi-lowomo.pdf
    • http://files.stpetersnsdunboyne.com/uploads/1/3/2/3/132302993/7492795.pdf
    • http://files.confabulationsbydbs.com/uploads/1/3/0/8/130874111/rurudakepus.pdf
    • http://files.icingonthecakebypaula.com/uploads/1/3/1/0/131070845/defozasoka_kuvalede.pdf
    • http://files.confabulationsbydbs.com/uploads/1/3/0/8/130874111/rurudakepus
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/36172507411.pdf
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/bijubajisarogubisejekix.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/rubazasireluzorifeburur.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0528/files/38776871903.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/zafif.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/futisifagojaxotofisad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/25921462978.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/papitugizuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/gemogidimizokazebugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/kovutedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/zeluguzezivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/bitozanixijofat.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005579.bin
a8ae41201788fa1b589674fc813f796981ec5d557600f5085999ceba7c8b4a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5579 5288 bytes
font_01_sfnt_off00006773.bin
93182d293e091152ac8efb260c65f23650260601fca181f43306338796966a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 9424 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.