Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6b1f9ab63bdc2b…

MALICIOUS

PDF

34.0 KB Created: 2020-08-09 10:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bb67f34824da9d4c4b47ae812e789b SHA-1: eed8581b12e3c81e4ee55fdece6efed9fa3b0393 SHA-256: 3d6b1f9ab63bdc2b42180f900a1b3cbb75cfb93d9f3f52b9ed705b879bb0515a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing indicating it is a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=simple+past+and+present+tense+exercises+pdf`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to `cdn.shopify.com` domains. The document body, though heavily obfuscated, also contains the primary malicious URL, suggesting the document's purpose is to drive clicks to this redirector.

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.cc/pify?keyword=simple+past+and+present+tense+exercises+pdf
    • http://files.lampleylaw.com/uploads/1/3/1/8/131856071/beparizesos.pdf
    • http://files.oncogenes.net/uploads/1/3/1/4/131407028/fukil-jujelikep-junolopujugivim.pdf
    • http://xaxin.propertyhomes.org/uploads/1/3/0/9/130969352/janux.pdf
    • http://files.jsquaredfood.com/uploads/1/3/1/4/131411688/2565022.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/genetic_engineering_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/18478854397.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/82221850194.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/mechanical_engineering_design_shigley_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/diruxevuramoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/34579099254.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/bessel_equation_solution.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/catholic_latin_prayers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/josolu.pdf
    • https://cdn.shopify.com/s/files/1/0439/5335/6955/files/vujosetalejusorow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/42822026392.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/34538737795.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_off000047bd.bin
fc1f9a9b2b3afb513dd96c1fc27d57934ba63128590c9bbd982758c7483f2dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47BD 5472 bytes
font_01_sfnt_off00005a43.bin
d895db50f065e689b57ebe0c545610e184b74a7d3680730722c2c621be09a69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A43 9608 bytes

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