Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e6ab242835bf00…

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 18:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bdd4ae38d951fa33ae85bc7bfbaf7e1 SHA-1: 32f0c444ff58059ef332fe3e03579ba0bb8c863c SHA-256: 56e6ab242835bf0073d1add3ba315bcbeb85167c088043d520a2ff82c83a7bab
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, pointing to 'https://ttraff.ru/wix?keyword=acceleration+worksheet+middle+school'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which lead to static.usrfiles.com. The document body, though heavily obfuscated, contains the same URL. This suggests the primary intent is to redirect the user to malicious infrastructure.

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/wix?keyword=acceleration+worksheet+middle+school
    • https://static.usrfiles.com/ugd/34ec99_8298b045c59d4d028b236f9fce772d17.pdf
    • https://static.usrfiles.com/ugd/89363e_d337be4407714730bd000d17088a8093.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eb543a0a3fe47a0903e4561e1c80e64.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d5a2dd33e8f4870ade6ce14afcca3b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c0b1f739eb242aa9231e83263d6eb70.pdf
    • https://static.usrfiles.com/ugd/b8c837_b44f45c77d03440097d8429de3e8c9a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b4cf20ed2634caabd44551752bf29df.pdf
    • https://static.usrfiles.com/ugd/b8c837_150f3557ebb9460486fd6a6afa461a1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_868d8264d78d4aec8feb2fc91f93e382.pdf
    • https://static.usrfiles.com/ugd/b8c837_709bbebb40af484b85921a52210b3de5.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/walking_the_dog_gershwin.pdf
    • https://cdn.shopify.com/s/files/1/0459/6075/7407/files/annabelle_2017_full_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/kubufovad.pdf
    • https://cdn.shopify.com/s/files/1/0439/0223/8888/files/misot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d4.bin
702b456a1f7ac95f805bc4f5e6454d3d5742304d8259103cc2952ae591b529d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D4 5112 bytes
font_01_sfnt_off00005806.bin
1a1f059914a7ee5f1e1df35b98fc421ba10edfafb8f62419711f4aef0ebeb105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5806 9588 bytes
font_02_sfnt_off000078da.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 4324 bytes

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