Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29e40795a2d9ddb…

MALICIOUS

PDF

40.1 KB Created: 2020-08-02 06:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af239fc98496d4ee71f1701a5b5283e3 SHA-1: 77364aa094018321891ee6f91feee04af72eeb13 SHA-256: c29e40795a2d9ddb3c0565a6be68ba6351988e15fbb8153a3b50aa4ae5874f1a
150 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4%25D1%2587%25D0%25B8%25D0%25BA+%25D0%25B0%25D0%25BD%25D0%25B3%25D0%25BB%25D0%25BE+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9'. Additionally, the PDF was identified as a link farm, containing numerous external links, many of which host other PDF files. The ML classifier strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable binary data.

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.com/pify?keyword=%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4%25D1%2587%25D0%25B8%25D0%25BA+%25D0%25B0%25D0%25BD%25D0%25B3%25D0%25BB%25D0%25BE+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25B8%25D0%25B9
    • http://files.rchsproductions.org/uploads/1/3/2/3/132303035/2998190.pdf
    • http://files.lmcndirectory.com/uploads/1/3/0/8/130813714/4deaf450100.pdf
    • http://files.screenvortex.com/uploads/1/3/0/8/130874612/3973525.pdf
    • http://files.feliciancaring.com/uploads/1/3/1/4/131407148/bubepiwenutarel-netukuxawanokod-wakenidubox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/71389702990.pdf
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/dedoroparujegij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/56413239208.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/89997465413.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/gasevoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/act_not_parsing.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8167/files/zedakinaradusakesuzid.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2289/files/75171634851.pdf
    • https://cdn.shopify.com/s/files/1/0434/6226/2936/files/gegonosemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/11351127942.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/65825799660.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_off000053f3.bin
df0a656451febd85181b923c8a37a7ba70e0b42abb5fa75eb5e078d76b3ed2e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F3 5692 bytes
font_01_sfnt_off000066c0.bin
c4dd754ddbe74582af473642008d26c76d154eca16e5cdec94e39ce69fd50578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 13476 bytes

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