Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45bf718040cb357…

MALICIOUS

PDF

33.1 KB Created: 2020-08-31 15:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1293144c4a577c80efee0421c1d4b9a SHA-1: 4af606a4a27f8c2a5edf00e7db319244f6cf115c SHA-256: d45bf718040cb3574ef739e97558d0e9aaa18c5a1741592ae87eeb64ce054156
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 'https://ttraff.ru/pify?keyword=buried+mp4+movie+free'. This link is presented within the document body, likely as a lure for users to click and be redirected to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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=buried+mp4+movie+free
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/mavujitomejidinoduka.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/35234689880.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0429/0510/8636/files/jinaginesitov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/votabimubufipirabi.pdf
    • https://static.usrfiles.com/ugd/02beb7_7a802cdb624a4c699d894957d01351aa.pdf
    • https://static.usrfiles.com/ugd/e4ff69_51a5757e106e45e4a825b9ed42a90daa.pdf
    • https://static.usrfiles.com/ugd/6f9b04_37c7f08ce78f4a039cb108315d24467d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c523ae3636a64e3ca895df55bfbf8d53.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/rumput_brachiaria_mutica.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/bureritalosonoremesaruta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/29380104080.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/vamawop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/ralowitatutenikafemo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/rotase.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_off0000452e.bin
5c9f006f277cabdbc82cc43ea45d35c83101520e5b529cd9d91ead2ca7f4d456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452E 4964 bytes
font_01_sfnt_off00005610.bin
8021455ac210f7fbf7fb90d060a19ac09f855392747660fe2b85dc6c31d8fe7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5610 9808 bytes

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