Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f11524e311253b9…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 04:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 700fac23dafe13187fdb986473f71f67 SHA-1: 33dbcc64595e40186d8fcf31d70b4ec504318ce3 SHA-256: 3f11524e311253b93de3b3fe83a9f22137281f09210940c774b22e72cc7a7fb9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=tensor+to+numpy+pytorch'. This indicates an attempt to direct the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains this URL and other links to Shopify domains, suggesting a link farm or content-luring strategy. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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=tensor+to+numpy+pytorch
    • http://files.costaricaherbalmedicine.com/uploads/1/3/1/4/131453256/114727.pdf
    • http://files.indianmarriagebureau.com/uploads/1/3/1/4/131407823/79f62c81208.pdf
    • http://files.lasalleyouth.ca/uploads/1/3/1/1/131164112/a6f2394.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/95145836135.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/83645622134.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/pusejavoxiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4631/files/3608262941.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/bitud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/bumedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/62369022155.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/kuwigefejutiniwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6706/files/82328064352.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/16150443843.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_off0000618e.bin
7eaae954266a077491f4c58e3c8e2473b494b62c64d782b7fe4f8447e480cb7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 4980 bytes
font_01_sfnt_off0000725f.bin
a8c30b55679e1509536b480f60965998672bd02ae736c2e3df3e4136474d9943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 13512 bytes

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