Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e34ec42afa7807…

MALICIOUS

PDF

52.6 KB Created: 2020-08-18 23:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c1411d6c975eddcb9fcc1294db79a65 SHA-1: f252faf19622d7df7240410ce5f0fe677a016e06 SHA-256: 99e34ec42afa7807a0204227c49dca1bab79981108a3a22ba9a678f5d82bf045
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=monolithic+construction+pdf, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to this URL and other PDF links, indicating a link farm strategy to improve search engine ranking and lure unsuspecting users.

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.com/pify?keyword=monolithic+construction+pdf
    • http://files.inthehoopbysher.com/uploads/1/3/2/3/132303337/vamarofitono.pdf
    • http://files.nc2020.org/uploads/1/3/0/8/130813846/5125a763c8.pdf
    • http://files.doggiestylezinc.com/uploads/1/3/1/3/131384663/6210112.pdf
    • http://files.julianayouth.com/uploads/1/3/1/1/131164418/8166440.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/20932581605.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/31095787462.pdf
    • https://cdn.shopify.com/s/files/1/0439/0299/2536/files/74598389761.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/73688769788.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/faziwop.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/rorinimojogit.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/levuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/14458289416.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/bigemunowafutotisif.pdf
    • https://cdn.shopify.com/s/files/1/0430/2697/2825/files/17509395017.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/popapufep.pdf
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/74938067326.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_off00008830.bin
59db4429fbfb583ef99b9853da50f280e00efcf0e873e3c7cde003ee23ad19a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8830 5040 bytes
font_01_sfnt_off00009956.bin
2d34d702e923dd130766b8ff013331fd443d4f90c865e56d20bdc8b93ebc2e9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9956 14192 bytes

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