Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce90da0f2b5f5b6d…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 15:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b0544caff31c062c6dacb44197d86b6 SHA-1: 974e7a6912dec64a6a99f296a0d6ecbfaf88c4c5 SHA-256: ce90da0f2b5f5b6d106c21b1d0ef0b34b645c5fccadb818d4cad4951b240c80f
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a trailer towing guide. This heuristic firing, combined with the presence of a large number of embedded links, indicates a phishing or social engineering attempt. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the attack vector.

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=trailer+life+tow+guide+2014
    • https://static.usrfiles.co
    • https://static.usrfiles.com/ugd/77941b_8b53a651e00f4832b423049d482f07a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f9bac77e7bd439588c58f39a9531f0f.pdf
    • https://static.usrfiles.com/ugd/078c79_89b05230e3f548df8e39d7170013520b.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_2324039249334e2ebb69951bafcbc2bf.pdf
    • https://static.usrfiles.com/ugd/6908d7_fd7ba86729164db68b9d4ff921567038.pdf
    • https://static.usrfiles.com/ugd/f55bec_8279c33ce18b463ba9f0fa1af8683062.pdf
    • https://static.usrfiles.com/ugd/b8c837_eadb04e4dd2a4112bd8e20bc403436be.pdf
    • https://static.usrfiles.com/ugd/225520_b881662f24f34b7dafce88f68120739d.pdf
    • https://static.usrfiles.com/ugd/2813e2_4a3d53dac7664c88b2b090180e9e58cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7337b047cace4f24a068a8c5ea9ac969.pdf
    • https://static.usrfiles.com/ugd/345929_03881932d8434896bffb6e957c2797b4.pdf
    • https://static.usrfiles.com/ugd/b56239_b7d579d6921e4a56b9e8789f951326d4.pdf
    • https://static.usrfiles.com/ugd/8b9728_99772a3f04d441d89bf1f311154ac518.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/62102943031.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/caderno_de_caligrafia_para_imprimir_em.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_off00006f26.bin
d63cd3fe19243c4ac19d1d9dda7c9dee46684587da77e37a2ccb3a28da91cfa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 5352 bytes
font_01_sfnt_off00008181.bin
f6f57004f4d2a3980e4ac17b550b942760f51c704a9630dba37f41ddb77520b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8181 10012 bytes

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