Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a06267ee35e06da…

MALICIOUS

PDF

42.2 KB Created: 2020-09-08 18:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86b65960f271ad55b907f42b36ca3cde SHA-1: f11c442dc07729ab39ec6234b33e670158b4b113 SHA-256: 3a06267ee35e06da66c1524721b2599de107d5e77ae121c97fa6bcb2f9477023
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=conformational+isomers+in+cyclohexane'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, characteristic of a link farm, with the dominant host being 'static.usrfiles.com'. The presence of these links suggests an attempt to manipulate search engine results or distribute malicious content.

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.me/wix?keyword=conformational+isomers+in+cyclohexane
    • https://static.usrfiles.com/ugd/2f07a1_c412411363f243c59505ddfa507d5df1.pdf
    • https://static.usrfiles.com/ugd/e3834b_1f9a0149e99c4f3da1a514d4355c1c0c.pdf
    • https://static.usrfiles.com/ugd/64bd79_5708d832182c4282acdef37b88ea3606.pdf
    • https://static.usrfiles.com/ugd/078c79_fb00b9baa9f7421d97e591032774429c.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_add04c8c7f2c40d0997b30f4d0c5fb94.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/chemistry_class_11_chapter_3_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/fetozixodapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/aptitude_short_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0439/1138/1147/files/grand_plaza_hotel_corporation_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/6815331024.pdf
    • https://static.usrfiles.com/ugd/b8c837_04f5f48ba3c547f8bc0aa6758eec0ba4.pdf
    • https://static.usrfiles.com/ugd/5a4aad_634fd768dda743dda95c3a419e797979.pdf
    • https://static.usrfiles.com/ugd/b8c837_beae7e68c9d34032ac0c56de8b4b6aed.pdf
    • https://static.usrfiles.com/ugd/76de1a_7ec931b8e6a147e4a5c4502ec16a548d.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_off000067a7.bin
c51974b7d17cf227b94a60b09b3d39c8d0e7d73a259fe7dce41fe5fdcfb5a224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 5196 bytes
font_01_sfnt_off0000792b.bin
5d567335a4b6ed7376e6e6bde13860b97df67f848f70463eeb7efedd41b455f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792B 10292 bytes

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