Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9afbe0cdd85cf1…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 17:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba26679c6129c56542a88229f34074e2 SHA-1: 5bedfaca89390371eec78cabe8e53ee3c5c940fe SHA-256: 4f9afbe0cdd85cf11190b88ed3a1884fa8295d9c9319d29ac3238a20c7d4dbeb
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text referencing a 'Brokerage house report on tata motors' and includes the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

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=brokerage+house+report+on+tata+motors
    • http://files.dirtroadindustries.com/uploads/1/3/2/7/132740951/9756527.pdf
    • http://buxupa.veradoverartist.com/uploads/1/3/1/3/131383726/31ba9301ac0.pdf
    • http://rupaluv.oldsantafe.org/uploads/1/3/2/8/132816066/zadejowawitewureziru.pdf
    • http://files.bridgeartsproject.com/uploads/1/3/2/3/132303219/11eb34858b87.pdf
    • http://nepix.alazhartemple195.org/uploads/1/3/2/6/132681670/6798690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/zevokowekabajadorura.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/32974855023.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/wegiwimoxevonazuroweted.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/900426822.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/5804928011.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/jimixiwemimoxejuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/maserinijituwulude.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/archive._org_games.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_off00006972.bin
616753c1d7860a146b65a148dd9a255793ed566f61bcb5535e9948f4b5f6f519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6972 5316 bytes
font_01_sfnt_off00007b5f.bin
e9bc58378fc71ffa0b28507543680853a2e89d21a061fd2ce7d8ac2aef21abf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 10932 bytes

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