Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c2935e358c4195…

MALICIOUS

PDF

34.1 KB Created: 2020-08-01 19:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 404f15f8fe265a628c43364056fdce1c SHA-1: cc23355987ca65e22232b21961d1a9a264dbfb41 SHA-256: 07c2935e358c4195d95c96abd47ab4b73edcafea966bea59acadcf308570388f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/pify?keyword=make+your+own+minecraft+skin, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'make your own minecraft skin' and the URLs, indicating a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=make+your+own+minecraft+skin
    • http://files.sino-oilfiltration.com/uploads/1/3/1/4/131437319/xofarig.pdf
    • http://files.emlteam.com/uploads/1/3/1/4/131407214/livobanefi.pdf
    • http://files.donandmargieabroard.com/uploads/1/3/1/0/131071076/f2b818fc74ed0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/cjis_launch_pad.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/git_untrack_folder.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/femazabirokaredofufokit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/36526272770.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/71015419964.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/binelojokovaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/remusaletopajuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/755541310.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/ravojevofivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/6108264537.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0876/files/87782069867.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/88299721206.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/10751129738.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/62371671774.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_off000048d3.bin
da1c842cfd1a60b77668baffc34e8cb9aae35b1a3c4ef6dc27443c10fabd2121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48D3 5256 bytes
font_01_sfnt_off00005acd.bin
8b2e833479ae335095941a0c724863c8b7ed5cc5695b86e28342a09a14087b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACD 9608 bytes

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