Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcb006968023483…

MALICIOUS

PDF

54.2 KB Created: 2020-08-19 21:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07129e40ae600cd2b7918a466cf24e13 SHA-1: 1d125c9303f1c886f395344b2092523c7f877ce7 SHA-256: fdcb0069680234835ba79a1cb30d395040f33fe43a9e06c1c859350bd22ed4c8
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one critical heuristic identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=eular+guidelines+sle+2019', suggests a redirection to potentially harmful content. The ML classifier also strongly indicated maliciousness. The document body text is heavily obfuscated and contains the same URLs.

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=eular+guidelines+sle+2019
    • http://vezuzu.smokeandfirecigars.com/uploads/1/3/0/9/130969220/34479.pdf
    • http://files.gawaterfalls.com/uploads/1/3/2/6/132695418/resixoxuvagafak.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8008/files/85459255844.pdf
    • https://cdn.shopify.com/s/files/1/0430/7061/9801/files/zusesawifejimusizasifagan.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/fibulazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/lefiberalixofojab.pdf
    • https://cdn.shopify.com/s/files/1/0436/9081/9739/files/mazexugumefaridir.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/89443840034.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4979/files/8359795005.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/36121719590.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/kodafekesidemovul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1727/files/equity_bank_loan_forms.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fadeluw.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_off00009571.bin
5c97c35484874061ae5d9ae63ca18afc73c67d54bded2741f673a2b9b22a2bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9571 5432 bytes
font_01_sfnt_off0000a7fb.bin
644091ba17f2952a000d701e48a476f92a0e01e1bcd592432ea1647e45383080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FB 10664 bytes

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