Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eddee940555c376…

MALICIOUS

PDF

63.8 KB Created: 2020-08-26 11:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b02f73859196f81b56fc2fd1fa553a66 SHA-1: 4f5d956dc42cb7573f87957208217de8e3ce2d5b SHA-256: 3eddee940555c37689571af911060208ead1668b63aeea34f048bd4b4c17fdce
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to numerous other PDF files, with the primary redirector pointing to a malicious URL. The document body, though heavily obfuscated, contains the text 'List of positive affirmations for fr' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier 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.cc/pify?keyword=list+of+positive+affirmations+for+fr
    • http://files.ruffworldtraining.com/uploads/1/3/1/4/131453486/kemazatojavorazofabu.pdf
    • http://files.defensivesolutionsmidland.com/uploads/1/3/1/4/131453996/suvuburugoninafepet.pdf
    • http://files.michaelbruley.com/uploads/1/3/1/4/131453837/borodizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/36798902847.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/xewebajibidokirolox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/tifiwawafisisebazawos.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/72604513374.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/hidradenitis_suppurativa_diet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/96095637915.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/vuroziwile.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/32643865705.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/61529005949.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/kelenedijemagow.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7637/files/english_speaking_countries_test.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099e8.bin
3ff997dc7ce24446a7cc99b3e03dafd9101e0d8ea8b0a4b092c03de7e274fd81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E8 4804 bytes
font_01_sfnt_off0000aa20.bin
d2499751d87d04ff64c77f72239420ca54cf7b9f8f66d1ee6a623814ae07e1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA20 10452 bytes
font_02_sfnt_off0000cdb1.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB1 16312 bytes
font_03_sfnt_off0000e33c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 4324 bytes

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