Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee43437f75fbb3c…

MALICIOUS

PDF

116.1 KB Created: 2020-08-12 23:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0bd6627a3dc1aa6ed4f744479dd6612 SHA-1: f31f0d834b11a386b453aec3721a1bef44e2004e SHA-256: cee43437f75fbb3c83e1c200c12e5fba59e3439799d7bcf1ca663839e95db78b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to obscure malicious intent or to distribute further payloads. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting a lure to a malicious site.

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.cc/pify?keyword=bosque+humedo+tropical+pdf
    • http://gaxoxawob.randijophotography.com/uploads/1/3/2/7/132712615/8034470.pdf
    • http://xiborijal.kpslaramie.org/uploads/1/3/0/8/130874276/7609936.pdf
    • http://files.centenniallakes.net/uploads/1/3/1/3/131384468/xepadomif_powemena.pdf
    • http://files.hatmendocoast.org/uploads/1/3/1/6/131637385/ec90be06e302a.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/short_english_stories_for_learners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/bemeset.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/26791089338.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/vadogidibujewusorudib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/6134022786.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/72454584985.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/hampton_bay_low_voltage_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/pudowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/foduxewes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/34745371169.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/regusanij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/ti_83_plus_manual.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_off000189c2.bin
d1ee69f81e5d3e0fd90c976c667717bf02a68af88647facf01d503086e24ff36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x189C2 5568 bytes
font_01_sfnt_off00019c8c.bin
081c5d1b476cfe622b395b35e8f4b399a7a1c156f0b1f6cf6c952c90953deec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C8C 11224 bytes

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