Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ebc223d6114975…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 16:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5309f463628994ad1ed695788ad16e55 SHA-1: 51afde6bcfd0f0eda83ad286a2c610d204fa758c SHA-256: 74ebc223d61149752d4656830e5e1ca74f04f3f7af4930cbde4bd02266ec127d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'gravitational potential energy worksheet answer key' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of a malicious redirector link indicates the document is designed to lead users to a harmful destination.

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=gravitational+potential+energy+worksheet+answer+key
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/65413166172.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/49020123146.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/38791832365.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/11715534987.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://static.usrfiles.com/ugd/ef7b09_796d8e7c6b854df8a3cf126ccd0b6e84.pdf
    • https://static.usrfiles.com/ugd/fb83f1_bc71568e988541a48ef4efe82b837459.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdf5f146ca094003854c4e8304bba7de.pdf
    • https://static.usrfiles.com/ugd/01bc73_a77865ee52374175a1eab1747d0b1523.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5199/files/zenedobu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/fogegelorilikulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/ruwajabufudaxonel.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_off00005fa3.bin
dedf3bd6799e904ce99f7fdafcca80f9d42a94955cd8734e0a041be2ed041e00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5216 bytes
font_01_sfnt_off00007176.bin
f4ec5a8ae280eacecaed94d5aae44957d9049af3b90a352b4b92e4a4ec3d3908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 9968 bytes
font_02_sfnt_off00009396.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9396 4324 bytes

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