Malicious PDF — malware analysis report

Static analysis result for SHA-256 89922a0d5e41a7a1…

MALICIOUS

PDF

39.5 KB Created: 2020-08-29 08:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e169fa5bb51999ebb59bcd89af19f1c SHA-1: 598c57eb5e14f3176bc0df400cd69277407801bd SHA-256: 89922a0d5e41a7a1aba89e6a83be434ed5966ade726e3a48d0bb01fdef4db5b0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=elementary+statistics+6th+edition+answer+key', is designed to lure users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, suggesting a broader SEO poisoning or traffic generation scheme. The primary intent appears to be directing users to the malicious redirector.

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/wix?keyword=elementary+statistics+6th+edition+answer+key
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/catfish_farming_in_concrete_tanks.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/ximatefunovevuxoko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.pdf
    • https://static.usrfiles.com/ugd/b8c837_91d4867ac1f04469b83472b97fd8454e.pdf
    • https://static.usrfiles.com/ugd/b8c837_759fa00d1b73406ab04d855dd876ea7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a9cd31d2d9843b48d244e41380b1e88.pdf
    • https://static.usrfiles.com/ugd/b8c837_9317eb29db70495d88f1b505263542c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3d3e43f08884d6d9d18d89848e83321.pdf
    • https://cdn.shopify.com/s/files/1/0432/8256/3232/files/rosugotimelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/59171714405.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/mowapoxugenavibujabuwowuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/davodapawuvapagexewal.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/comparative_adjectives_worksheet.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_off00005a2a.bin
3308c04dd1e040e008eb7deb1694c955ea6c26135fac322c7388c28f371445a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2A 5548 bytes
font_01_sfnt_off00006cea.bin
017c677457fc1ac9515e4c16ec3c2b5dcaf44520bcc23e92ac885c872985928d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEA 10804 bytes

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