Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10364e6329bc568…

MALICIOUS

PDF

54.1 KB Created: 2020-08-23 13:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000fa66d36a812a80770e98954ecc8b1 SHA-1: 50347edda1eeec3d519ca18f4ce90ea310b75d12 SHA-256: f10364e6329bc5686250a4d252d347eb28ed113fe7d5af4357af4ced84e6cf3e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru, which is used to lure users to other sites. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the URL https://ttraff.ru/pify?keyword=avery+labels+software++free, suggesting a lure related to Avery labels software.

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/pify?keyword=avery+labels+software++free
    • http://files.allnationscoast.net/uploads/1/3/0/7/130740530/3234118e.pdf
    • http://files.turborenovations.com/uploads/1/3/1/4/131453588/2038804.pdf
    • http://files.mascomusic.org/uploads/1/3/1/4/131452953/4048401.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/kidefujivawova.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/39013503310.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/52368769145.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/70930279953.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/69964172130.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/wozok.pdf
    • https://cdn.shopify.com/s/files/1/0464/6977/5528/files/make_preschool_writing_worksheets.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b96.bin
7a68e0a374b13ce4fc1843d5bd83951dfa24db5a1609023d75d240d157c1dd9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B96 4348 bytes
font_01_sfnt_off00006b11.bin
db4c4d665382703f80e23ec76387a4a39130571595cd4d23d4ad6adb4d2ac3e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B11 5144 bytes
font_02_sfnt_off00007cbf.bin
fcec3975eb95d600f1a02d0ce4b9483751b610613c53e47e1205f0c97d09b79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBF 11264 bytes
font_03_sfnt_off0000a3bc.bin
0b219269a25d71082740109f79a81e7c738173c6f86da4bd38b421d18cbe9343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BC 17300 bytes
font_04_sfnt_off0000bd91.bin
e0fd0490ab9470513b8d2b1b8d7992f25ed09c0bde43ea5eb2d216e8b7aecf6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 3432 bytes

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