Malicious PDF — malware analysis report

Static analysis result for SHA-256 f076eae5c099e543…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 22:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7755c9091b56ff869fe4d0397bfa6629 SHA-1: 63e508701183ab88233a43cb7ce06e0349ecf0be SHA-256: f076eae5c099e543f36bd56d787589c7d90cb03650ea92b90cd5ae5a3e04970e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=should+ought+to+had+better+grammar+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users to click on the embedded links. No scripts were extracted, limiting the analysis of further malicious behavior.

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=should+ought+to+had+better+grammar+pdf
    • https://static.usrfiles.com/ugd/b8c837_27dfb1cac86645f6af163c36c0c134d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_db5ce2301eab471998b6d72e6d83ad04.pdf
    • https://static.usrfiles.com/ugd/99965f_d42544483ea741ecb1cbbdb1a73720e8.pdf
    • https://static.usrfiles.com/ugd/83d902_25d5e75578884191ae2a3637aea67203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/xevala.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/barbie_escola_de_princesas_musica.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/43774816652.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/sipije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0461/6129/7560/files/bijiwex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/35768592786.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6849/files/19923627934.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_off00005fc0.bin
b0a273c170037c2e50e7a02374132f20f8ac64716c18aebc7bc662a2ed6e2b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC0 5520 bytes
font_01_sfnt_off00007256.bin
6736a10fa243190e528b11fe956ae2bbb5d385b755b1b26144f8667e8d20b598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7256 15160 bytes

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