Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9fe386ff3b1b78…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 13:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af44c692f6ae8ddc7ebd54fb14854cc7 SHA-1: df06034c25c30cf4f2747cc92c48fc34626c0965 SHA-256: 2b9fe386ff3b1b78c871e5e9205aa5ba0503d5c0066ddc52ea5d95c73be9c51c
150 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 to other PDF documents, characteristic of a link farm. One of these links, https://ttraff.me/wix?keyword=nimeti+islam+osmanl%25C4%25B1ca, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=nimeti+islam+osmanl%25C4%25B1ca
    • https://static.usrfiles.com/ugd/f523c3_bd2d064adeac406b866be04b8d0e5e07.pdf
    • https://static.usrfiles.com/ugd/ecec20_e223ad09d1cf467ebb7f3ab5fffb715a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a632ee9836d48e6bec1a7a2dcf40888.pdf
    • https://static.usrfiles.com/ugd/097bd5_18a0681448904058b753dd758f986c6d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/nutrition_et_sant_cours.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/38539917899.pdf
    • https://cdn.shopify.com/s/files/1/0429/0969/6156/files/dajaja.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/derivatives_markets_mcdonald_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/pukeko.pdf
    • https://cdn.shopify.com/s/files/1/0462/4731/3557/files/obras_de_averroes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/antonyms_and_synonyms_examples.pdf
    • https://static.usrfiles.com/ugd/b8c837_55ccc61bb7a942039f0ba64841579924.pdf
    • https://static.usrfiles.com/ugd/b8c837_a357a50928244d5bb6def5c10414f7e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e1b23471f6f4d3e8f2d2802ff2bfa3d.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_off00006d15.bin
90aec1fc2aa2b9a54db635c2baf4d4fa6e0d2f071b78845cecac895f5a79b28d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 4852 bytes
font_01_sfnt_off00007d87.bin
b7a1a067ac98fc5c507b6059a48431b63ed818a93001dc2522000d549997ae7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D87 12028 bytes

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