Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bfe2d12efcfa8bd…

MALICIOUS

PDF

48.9 KB Created: 2020-08-24 16:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6bd4a088e6cafeee6d8ce62026f3872 SHA-1: 45fec9480e34163298e293ee4b5558d8b3d277ae SHA-256: 6bfe2d12efcfa8bdfd03a65925883b22660a2612085003cf1cde8e15c62e759b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains text related to uniforms and a URL that appears to be part of a link farm, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=camisas+tipo+columbia+para+uniformes+guatemala
    • http://pogugobo.susantregoning.com/uploads/1/3/1/3/131398252/dosufi.pdf
    • http://zuxifexun.mouseandcastle.ca/uploads/1/3/1/6/131636725/rivasi-wubuvosubizejiv-powujemixivipi-fepotatipo.pdf
    • http://vipoze.graindesigns.co.uk/uploads/1/3/1/4/131409090/dogexekifazixi.pdf
    • http://tosizod.aim-na.org/uploads/1/3/1/3/131398101/fogedir-visigivomen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/93220838224.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/social_emotional_development_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/81149042644.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/vitamin_sources_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/lagu_123_chinese_zodiac.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/72294369987.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1477/files/modern_pricing_of_interest-_rate_derivatives.pdf
    • https://cdn.shopify.com/s/files/1/0434/3336/1574/files/24528074095.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/pengembangan_kawasan_agropolitan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/33682655433.pdf
    • https://cdn.shopify.com/s/files/1/0433/4321/6789/files/electron_configuration_test.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aa0.bin
0d6bac5bf825bcc7d2456f92ebdde222375331a92e6f1d4556843ad99b352aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA0 5380 bytes
font_01_sfnt_off00006cca.bin
2cd9ee6f859b26a7ce9bfe7ebe157abfc62cfedf97b6243961b36024e5ffdb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 2360 bytes
font_02_sfnt_off0000778b.bin
e4be12ed2ba60b13123ba938678ddc8d773fddac91d35b4a4e17fea6fc5a33f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 11380 bytes
font_03_sfnt_off00009d0c.bin
4c6596ca5c498758faf9b633df8eb1aa29a5966493818a1b47d3f495eb40317f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0C 16968 bytes

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