Malicious PDF — malware analysis report

Static analysis result for SHA-256 da40bd2bc1de24fb…

MALICIOUS

PDF

46.7 KB Created: 2020-09-01 04:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77e672f9f15ebecf3ba393f2bb50fcce SHA-1: 99b1f6af9c601d7f4cf173a63bae6f05db2e1bfc SHA-256: da40bd2bc1de24fb0369d5a50ea07e18d7f3220f51f0cbdea0a8b39e4ed2d50a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary malicious URL being https://ttraff.ru/wix?keyword=bully+scholarship+edition+mods. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent. No scripts were extracted from this sample.

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=bully+scholarship+edition+mods
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/38849268314.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/13334934947.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/menugisori.pdf
    • https://static.usrfiles.com/ugd/1e4819_e91dd736d5c04bd3bd270f9619c29c96.pdf
    • https://static.usrfiles.com/ugd/cc03df_b75d9c998ebb4514a10cb53136fd3fea.pdf
    • https://static.usrfiles.com/ugd/65b209_386fd0393b774d308bb972bb2dd9b076.pdf
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdf
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/mabutuzazutedefogi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/kopista_bartleby.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/32455629069.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/data_mining_software.pdf
    • https://static.usrfiles.com/ugd/b8c837_96d04563b91e43d4904875a785eaa00c.pdf
    • https://static.usrfiles.com/ugd/db1da1_2be999f8b05d46d7b4435c2eb3c97440.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_off000061d0.bin
1bd72c71b0213a211be84e3dcbf4ef9944647c50a1ecd361e95aca7f87cc1486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 5464 bytes
font_01_sfnt_off00007449.bin
7a19a9d5d93c7864c833ac1ae7b22cf4c4e2062ebc635c242667d92ce4687c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 10384 bytes
font_02_sfnt_off00009809.bin
69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9809 16332 bytes

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