Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84111b32703cddb…

MALICIOUS

PDF

51.5 KB Created: 2020-08-02 10:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a0f3896298bbb20ffafdda60b6be3c SHA-1: f76144fa9eff7a9b1b0999db13f6aede0797645e SHA-256: d84111b32703cddb1b15bf955ab47084cc00a7070d1c17e22f017ebc605f35a1
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=photography+copyright+release+form', which is flagged as malicious. The presence of numerous links to Shopify and other file-hosting domains suggests a link farm used to distribute malicious content or for SEO poisoning. The ML classifier also strongly indicated maliciousness.

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=photography+copyright+release+form
    • http://files.ninemiletouring.com/uploads/1/3/1/4/131411199/vetener-wuresakaxol-wetofuk-wufegejame.pdf
    • http://files.deltasculling.org/uploads/1/3/0/7/130738955/botizin_buvexab_nekuburoz_jitiverefekuve.pdf
    • http://files.virtu.rocks/uploads/1/3/1/8/131856619/zipatetanef.pdf
    • http://files.kwtintl.com/uploads/1/3/1/3/131379899/xizipuviwagozuvu.pdf
    • http://files.marciasantore.com/uploads/1/3/1/4/131406506/6f2e9c78.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/kolemisupesajafaziwevo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/29744232043.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/77650116556.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/25961799023.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/71772230092.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/88400389533.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/2879613078.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/41452071398.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7858/files/komib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/29477024209.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1275/files/34792117610.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_off0000862e.bin
72d2c5a92b1f623a4f5480989f6e2d32f40824d903d91f0baf775d900b107b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 5532 bytes
font_01_sfnt_off000098e4.bin
22daa2f5072832c11bc05857978549e04734673b8730a9cec774190a8c186a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E4 12272 bytes

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