Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3b6c97bea9a5d3…

MALICIOUS

PDF

79.3 KB Created: 2020-08-09 00:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be56c0238bdde002e5a8be076a1f79e5 SHA-1: a9d1acc0b40e9851b395dcca4460f9a0d0163d26 SHA-256: fc3b6c97bea9a5d30b653055c209136290a0c9e2f2d7eeae6e75bd43f295261a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified links pointing to known malicious redirector infrastructure, specifically 'ttraff.ru'. Another critical heuristic noted a large PDF link farm, with the primary URL being 'cdn.shopify.com/s/files/1/0431/2812/7645/files/kukavakasatumikifusagi.pdf'. The document body contains garbled text but includes the suspicious URL and authoring application information.

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.ru/pify?keyword=bosque+muy+humedo+tropical+pdf
    • http://files.eastsidecoc.com/uploads/1/3/1/1/131164452/lozav.pdf
    • http://files.newstages.ca/uploads/1/3/1/4/131437949/meliv-wizara-xusarijutibo.pdf
    • http://tofubede.copperchiefstore.com/uploads/1/3/1/6/131637814/7af6c0245adef.pdf
    • http://files.longclublambs.com/uploads/1/3/1/4/131437724/regadojiz-dulumiwiziso-tulimunem-laxiwolekepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/kukavakasatumikifusagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/vonozixolusesikavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/raketedu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/logapokepilakez.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/77848043149.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/voboxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/mifokolir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/boresejerug.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/2020_calendar_template_editable.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/beginning_fingerstyle_blues_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/bacterias_mesofilicas_aerobias.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_off0000fa78.bin
fbbb60e5be699233056ad68d781fd5ea767383ae81a7589aefa3d0d737bdc2d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 5672 bytes
font_01_sfnt_off00010da2.bin
fa74ca2d9c924b1cb6a9f431db13e117074d8ac7a5a3d7a2cc885bd7e95bc8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 10076 bytes

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