Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e40910c79f3f56f…

MALICIOUS

PDF

58.4 KB Created: 2020-08-21 11:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb31337ebe8405f3f995e1bd3d4f3cb5 SHA-1: 1abbd2104a65c3b9d877dcb848fd40b7b22e8bc4 SHA-256: 1e40910c79f3f56fc80ae9f15131f877aa7daf92a377e2dc937ebfa79d8310d4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic, suggesting it's the primary lure. 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=av+malformation+leg+radiology
    • http://files.kelownaplasticsurgery.com/uploads/1/3/1/8/131856743/napiwubopef.pdf
    • http://files.teahubveg.com/uploads/1/3/2/6/132682655/8dac3b6391c9b.pdf
    • http://files.updatescentral.com/uploads/1/3/1/4/131437605/pewedimuzejiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/nafazolanokuxewevufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/61307299515.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/jipolisagiseg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2394/files/emulator_ps_vita_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/jazewebor.pdf
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/94992700956.pdf
    • https://cdn.shopify.com/s/files/1/0435/9602/1919/files/catchy_business_names_list.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/33505232701.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/65408199190.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/kisobekor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009223.bin
7f3d6a6856340ad3919edf24d917d2113506088775138d67e71ab67978212822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9223 4988 bytes
font_01_sfnt_off0000a304.bin
57927dbe663f66db53ab0fa80fede78be10823355b08ea77e7a40cc2c6bd5531		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA304 13568 bytes
font_02_sfnt_off0000ce4e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4E 4324 bytes

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