Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e2435f3b854e91…

MALICIOUS

PDF

40.4 KB Created: 2020-08-12 07:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d245104986d10b487d617d5bf95dd1 SHA-1: 37c138b7488bbf5fef151e77eba87882d3534e4b SHA-256: e3e2435f3b854e914be43a096643c9dc092af6206d958f7302950ba9413d8f7c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many of which are likely part of a link farm. The embedded URL in the document body, 'https://ttraff.ru/wb?keyword=philosophy%20of%20integrated%20science%20in%20nigeria%20pdf', is the primary IOC, likely serving as a redirector to malicious content.

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/wb?keyword=philosophy%20of%20integrated%20science%20in%20nigeria%20pdf
    • http://files.bluevista725.com/uploads/1/3/1/3/131379439/nagosinuzefowa-muxaromefaj-petilo.pdf
    • http://files.waterinitiativeforthefuture.org/uploads/1/3/0/7/130775475/d841eb.pdf
    • http://files.pawsitivedogtraining.org/uploads/1/3/2/3/132302733/jusedafimapapakinuj.pdf
    • http://files.flowjerusalem.com/uploads/1/3/0/9/130969300/degalulujire.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/introduction_to_public_policy_and_administration.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/12410237692.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/44289745684.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/zarowubikapakebane.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/nofozoxibokolunikobi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/vumuweka.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/zinunesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/46233161555.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/buvifibagisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/bateki.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/83496211513.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_off00005faf.bin
52c308de0b69fa660bb2fbc51f1f102bfa220ed11146ef7251c830fe5bb37e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAF 5520 bytes
font_01_sfnt_off00007266.bin
57d0fc9ddc76fe31a21bfb811eecb54f4bcf62cca184a25e0cdfd65a55f1102b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 10024 bytes

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