Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8382b5f02832c8c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 09:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bdd2719a7c6d16e055be607fe16ba7 SHA-1: 56c3ad66d1429b57088267cf4ecc5947561cc314 SHA-256: f8382b5f02832c8ce824a8c5999f78ab09178698efa070a3e8253a9306acafd2
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 a link farm hosted on Shopify. One critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, also contains the same malicious URL, suggesting the primary intent is to redirect users to potentially harmful content.

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=aortic+regurgitation+pathophysiology+pdf
    • http://files.yennang.com/uploads/1/3/1/4/131453823/8108054.pdf
    • http://begenagel.crestwoodmb.org/uploads/1/3/0/7/130775726/12421e.pdf
    • http://zotuvu.beachgallery.com/uploads/1/3/1/0/131071278/8358cc8f8e2.pdf
    • http://buzapifag.quickcatclaims.com/uploads/1/3/2/6/132682076/929289.pdf
    • http://mawam.artshackwallabadah.com/uploads/1/3/2/3/132303219/sejumisawiri_tumez.pdf
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/caccini_ave_maria_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/3782054506.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/addison_disease.pdf
    • https://cdn.shopify.com/s/files/1/0439/3382/7240/files/trane_air_conditioning_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/xararanoxubapevusijezej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8484/1124/files/lowaxonosot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/nifiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/jezuravipiximawuviw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/8928768099.pdf
    • https://cdn.shopify.com/s/files/1/0447/4866/9079/files/theory_of_alternating_current_machinery_alexander_langsdorf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/a_level_past_papers_physics.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_off0000673e.bin
23d9d8929741d968001a9969f40ac13cd06f259d52a56a6a30b500dde3e7c735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 5508 bytes
font_01_sfnt_off000079fb.bin
2611e1d182f778f5b357c93ab374d848aa8dd7c384fdf8cdd3a4b35886d96ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FB 10688 bytes

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