Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cd2f477df53ad5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 12:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a75b26458b33716e7f6d9934243985e9 SHA-1: 9d9b5bc599e7264d246bcbdba1354fff05ef2ff7 SHA-256: c7cd2f477df53ad5928cca4681f5a9c2f06c74e6a10d6d57246486e977584e07
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to direct users to harmful content. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure related to an Arduino starter kit PDF. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of multiple embedded URLs and the redirector strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=arduino+uno+starter+kit+book+pdf
    • http://files.ironbridge-analytics.com/uploads/1/3/1/6/131606563/bodolexivedazaxubegu.pdf
    • http://minosig.modestmayboutique.com/uploads/1/3/1/4/131406082/matebo_bokevexixip_gatefazujudurel_malegawij.pdf
    • http://files.haleycloud.com/uploads/1/3/1/0/131069886/xobuwemex_dawaloxo_wanowupeji_lirodetilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/kunci_jawaban_understanding_and_using_english_grammar_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/pifixawapijojugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/siguwopusojasevironisune.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/98061818373.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/64436818515.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/lidumuvomiwaxalagazuxex.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7737/files/bible_study_on_forgiveness.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/83950694747.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/renerabirawupaxunuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/17800630700.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/15248344462.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_off00005c33.bin
fc1e522a302608ad34b05328c1afc5931b56f8bce29346a301837ae69f7fecb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C33 5196 bytes
font_01_sfnt_off00006dee.bin
40ec38cba339cdf03d713483f44acf93e0644012435d344e98c19d6ac0bf9895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEE 15444 bytes

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