Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cf8dde941d6f39…

MALICIOUS

PDF

32.6 KB Created: 2020-08-18 14:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 438ac19514b17d3cf8e2d6cf511e0d9b SHA-1: 9f5b898852db325de13a5e88b2aff9f4f20ab6c3 SHA-256: 30cf8dde941d6f39332e9e9894f92f7fd53aa54c6492cde2cb1d168b73c9f93b
120 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 delivery. The document body, though heavily obfuscated, contains text related to 'sound barrier sheet supplier in singapore' and the malicious URL, suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=sound+barrier+sheet+supplier+in+singapore
    • http://files.michaelakoll.com/uploads/1/3/1/4/131406849/6198911.pdf
    • http://files.tomasosinski.com/uploads/1/3/1/4/131437246/80a374c93.pdf
    • https://cdn.shopify.com/s/files/1/0440/4481/2438/files/34205807975.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/autocad_2010_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/99733011463.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9136/files/vudagipirajakejobobudogar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/xagunakedowimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/schlumberger_petrel_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/98122122303.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/30475137810.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/xulaxonuxugivapuvudoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/duvipalosasobevopuxato.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/71385944383.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/bastien_piano_basics_level_1.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_off000042ad.bin
a57797d3925b12a526aa1d939d56a2f30d17f785b64090f40d3890168753ceee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42AD 5464 bytes
font_01_sfnt_off00005529.bin
e15b9e82bc29dcea2c174babbc89e6ea75e43d3db72d63514db0719d38c8f515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5529 9472 bytes

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