Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3157c70f33a59c8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 17:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2d27b89c31fed1e09d74bacacbd349 SHA-1: 0f55c2a3d6326cb6430d6e1f45232214251fa735 SHA-256: b3157c70f33a59c842fd4c6f7b4ac055ffad77034b040e07782a62117312d211
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This redirector is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the text 'literary analysis essay rubric pdf' alongside the malicious URL, suggesting a lure to trick users into clicking the link. 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/pify?keyword=literary+analysis+essay+rubric+pdf
    • http://files.cariboucafe.com/uploads/1/3/0/7/130775959/ludezamizuzagazu.pdf
    • http://xifekoki.1968mhs.com/uploads/1/3/2/6/132682076/jukukemasurumofajepu.pdf
    • http://files.joselinehardrick.com/uploads/1/3/1/8/131856433/6965939.pdf
    • http://files.foreignpressassociation.org/uploads/1/3/0/9/130969241/ritomup.pdf
    • http://files.josephhickman.com/uploads/1/3/0/7/130776826/kalopinaga_rudonef_mumufepofura_tavap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/99052059451.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/zizixo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4373/2126/files/duvavurejowifuzikit.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/66300857602.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/12029197391.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/pukusofofumuxuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/22866481515.pdf
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/13601659894.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/59709827573.pdf
    • https://cdn.shopify.com/s/files/1/0439/0243/5483/files/98993850252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/75002318496.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_off0000682e.bin
f43456f0ca24018525e58010c8037cb1cc2dc83f8579ee8343de7fb425fa256f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682E 5332 bytes
font_01_sfnt_off00007a60.bin
b891a5112924cdce1e41a6ffdf11b5bdc19ca21b0d3e2f9749ec2b49511c4ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 9608 bytes

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