Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b416cc05721570…

MALICIOUS

PDF

33.3 KB Created: 2020-08-30 17:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d792e7126112f788643e7dcfc858e7 SHA-1: 3b5fec3a153c8424d715c4a56e65d3e3d1f759e3 SHA-256: 49b416cc0572157008b13a2bcfc04b3a673943ba67f517a94339df039d460726
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=100+statistical+tests+in+r'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs. The document body itself is heavily obfuscated and appears to contain the same redirector URL. This suggests the primary intent is to lure the user to a malicious site via the 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/wix?keyword=100+statistical+tests+in+r
    • https://static.usrfiles.com/ugd/b8c837_31d6aa0e9d5543118ae26bcf2e4f5273.pdf
    • https://static.usrfiles.com/ugd/b8c837_36ab2292abc746c7bd03bf81886881ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_b107720b1cf5421ab279440d713f8153.pdf
    • https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63a33f508754923bdda1c87aa9d44a9.pdf
    • https://cdn.shopify.com/s/files/1/0438/2418/5506/files/zomusagizoseguvuji.pdf
    • https://cdn.shopify.com/s/files/1/0466/3191/1589/files/coliformes_en_agua_de_consumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/sokijitasofevilese.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/xipowepaxudoranebi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/73308293121.pdf
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/fafugeremesejapamasim.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/vaneladobelikidoxizodinov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/46108247821.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/10593443419.pdf
    • https://cdn.shopify.com/s/files/1/0435/1203/7540/files/marathi_katha_kadambari_download.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_off00004843.bin
199680189627eed57d5555ae5ef98f39bdc4d3fb288d07eee3e32baad2b3670d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4843 4892 bytes
font_01_sfnt_off000058e2.bin
2da49f5c815509b62807461856ae0d8379fbe66b8f66eda927e3c05241fd4938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E2 9336 bytes

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