Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbec70374cdef25…

MALICIOUS

PDF

53.6 KB Created: 2020-08-25 07:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ee6ddf5309f040f30400c04f47738d SHA-1: afbe88534f40f4c99e081f697e4f2e061dec6c1c SHA-256: cfbec70374cdef25cfa541b01ca4f6a071f5c2539bbe4cd366bec72f85ebbb75
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDF files with numeric slugs, suggesting an SEO link farm. One of these links, 'https://ttraff.ru/pify?keyword=behringer+mixer+2442fx+manual', is flagged as a malicious redirector. The document body contains garbled text but includes the same search query, indicating a potential lure. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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=behringer+mixer+2442fx+manual
    • http://fekivu.sublime-colors.com/uploads/1/3/0/9/130969057/pupalinexi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7069/9160/files/86835234139.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/33165045929.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/barreras_arancelarias_peru.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/metformin_er_half_life.pdf
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/sixth_sense_technology_documentation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/pikibatolomegibom.pdf
    • https://cdn.shopify.com/s/files/1/0454/0373/4184/files/theological_wordbook_of_the_old_testament_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/lagomewedumotamuti.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_off00008c88.bin
b02b5ad720129c7e91c1a9f49062381cb0e1f1970fef094df3cea84bccc606a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C88 5340 bytes
font_01_sfnt_off00009e97.bin
57f09cfda3976011a5991d69dff26ddb278816608d98e3b1666e5e26612c0ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E97 14068 bytes

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