Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2700c3d10b427b9…

MALICIOUS

PDF

32.2 KB Created: 2020-09-01 04:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63c2ceccb55612c419f0c93a21b1eabf SHA-1: 4d2ff037c7857f4180028fbd3d2d29bf8b3dadfc SHA-256: e2700c3d10b427b96f44bad4baf244884653985344194aa44ca10100ddf858e0
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for various documents, including 'biozone ib biology answers pdf'. The primary malicious link, https://ttraff.ru/wix?keyword=biozone+ib+biology+answers+pdf, is identified as a redirector to malicious infrastructure. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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=biozone+ib+biology+answers+pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/mr_coffee_cafe_barista_manual.pdf
    • https://cdn.shopify.com/s/files/1/0464/0709/0331/files/19369588236.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/recode_variables_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/82555884674.pdf
    • https://static.usrfiles.com/ugd/b8c837_979f6193c14e44f6b477b5c27ec9cd19.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2577de5a0e44cbc9f981bb7adcfa6f2.pdf
    • https://cdn.shopify.com/s/files/1/0463/6177/2187/files/nogopozesegususi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/87542816688.pdf
    • https://static.usrfiles.com/ugd/2f7815_2f0d8d602fbf4897b4a4c921460461d9.pdf
    • https://static.usrfiles.com/ugd/3aca14_265cfe1fc25c4f25a69e684db78d8c57.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b1c3a4a488b449f858988c12aeafdd7.pdf
    • https://static.usrfiles.com/ugd/cb5dea_06fbaa21fc284d84851073782bb12529.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_off000042b2.bin
872b9cf0ab34f25945e9ce1b159777da9f2ecd0851e74f7eb4e2d5fb504dc7e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42B2 5644 bytes
font_01_sfnt_off00005614.bin
b733fe6b6516805184bd6dae7b3a260d032bedeb7b966dd5c42f00e336eeb3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5614 8924 bytes

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