Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d3d6a7b5a8b692…

MALICIOUS

PDF

35.1 KB Created: 2020-08-18 16:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6f8fc55a26268ec6d209bdb8c320263 SHA-1: 099c4e30c71216c671638da280240727563d1767 SHA-256: 72d3d6a7b5a8b6929583d79c565c2a51efb1e377ff1f0ae215172220f39bed5b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL 'https://ttraff.cc/pify?keyword=miss+you+song+enrique+iglesias'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though partially corrupted, contains the malicious URL, suggesting an attempt to lure users to a potentially harmful site.

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.cc/pify?keyword=miss+you+song+enrique+iglesias
    • http://files.islamthebasics.com/uploads/1/3/2/8/132815343/07ebcf.pdf
    • http://sonez.mckerrinkellydirector.com/uploads/1/3/1/4/131407057/1409638.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/sample_words_attendance_tracking_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/23003787246.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/gosisiroxometakexebi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/housing_policy_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/85222522164.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/mojujojinode.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/73938427585.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/xafosox.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/gabowutisoriziwigaxexup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/fabeveguputemapapefepuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/xozekiwitikirikodagarilam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/57949303355.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/didul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijufetibumumupaxewaromuw.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_off00004dfe.bin
387bc79c5d3666a882f3fb1dfa238d09f79e08877bae3447dcb28ae32ae554a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFE 5084 bytes
font_01_sfnt_off00005f5a.bin
12ae4918a611c9dd75bd0da349140fa06276a83b0d191d5afca331bb97ceeb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5A 9400 bytes

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