Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd79e2c72899729…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 14:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a76f52993857dc788551689cb0f6b2 SHA-1: 78598d93ae173b2af25699f091f382c72f7d691b SHA-256: 3dd79e2c72899729bacb5c0e44d51bb287ba0303e236b03cf9a6d7fbb673baaf
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to flooring and the authoring application, suggesting a lure. The presence of a link farm further supports the malicious intent of directing users to potentially harmful sites.

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/wix?keyword=linoleum+sheet+flooring+lowes
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/wuzebamaluko.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/bjp4_self-_check_3._13_mathexpressions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/google_image_upload.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6845/files/72039205046.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/xixaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/vocabulary_activities_for_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/best_budget_tablet_for_reading.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/waraxanojukakiwulamoful.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/51950946637.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/insignes_scouts_et_guides_de_france.pdf
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/fur_elise_virtual_piano_sheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96821df49074073aed284cbbc37b7f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89d68849be6470da648a9c094566a68.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_off00005549.bin
1ba4dfd5ad612286ed8fbc2e78c16347d2ec9b63fd68d221b2a76c598cda9b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5549 4884 bytes
font_01_sfnt_off000065c8.bin
1e9982b5c1723023d32947c3a2940f0d298167afe81780936389981dc80c2fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 10640 bytes
font_02_sfnt_off00008a2a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2A 4324 bytes

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