Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b22f83568f193b…

MALICIOUS

PDF

55.3 KB Created: 2020-08-02 06:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eb9039b16bae027ac3d7de54dda1f13 SHA-1: a817f9a07eda0fd2b528760614a56148c4c86737 SHA-256: 95b22f83568f193bcbfa48941a526d79b708953818794a499d0388dd61299be4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=suit+skin+minecraft. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure for users to click through to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=suit+skin+minecraft
    • http://files.shipasapfreight.com/uploads/1/3/1/1/131163740/jedalonoxe.pdf
    • http://files.forgingdreams.com.au/uploads/1/3/0/7/130775387/dikejosok.pdf
    • http://files.camillasamengo.co.uk/uploads/1/3/1/8/131856173/kuwepukadoluwubogoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/tuzutitemarobufoxonin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/12320026683.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/vererujogepase.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/puzurebenijudonazepun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/gixezawitovoxakuxiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/12088492024.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/gitezabewapujefumesekatuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/0794/0520/files/toselefigerukegoburifu.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_off00009b73.bin
480e5cedda9b5684305f45db55af48ccd1f03fe2e87560dfd38844ecbb4654a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B73 5160 bytes
font_01_sfnt_off0000acef.bin
2ab78eb71e4eed913fb135b940b30042cff9fa0cd128361e4a434ab933a51069		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACEF 10392 bytes

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