Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea8748266632416…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 11:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9edeaddb8b6449e0af8fe7c166f0435e SHA-1: 50d2c82df1e9c98261eed9b4c9da7cdef2b9b3f1 SHA-256: cea87482666324167bd6c5799976a2d41bb90300c11d171dbb743c00713868a5
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate document downloads, but one of the primary links redirects to known malicious infrastructure. The ML classifier strongly supports maliciousness. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector.

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.cc/pify?keyword=supply+chain+management+a+balanced+approach+2020+pdf
    • http://files.sbcuw.com/uploads/1/3/1/6/131607053/vomelabu.pdf
    • http://wulato.stpeterssaints.com/uploads/1/3/1/3/131383664/2e774dde5d8.pdf
    • http://files.stpaulelca.org/uploads/1/3/1/8/131871730/faferanazizeweb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/accurate_scope_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/wapetidor.pdf
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/design_of_machinery_norton_4th.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/lake_winnebago_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/97301081117.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/mark_twain_huckleberry_finn.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8264/files/calendario_mundial_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/mepavizirezup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/nodiwetuxixulif.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/wuvadun.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/thinking_in_java_download_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/75300519193.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_off000067d1.bin
fa4ded9456ce62ce3b4a863a018faba2c1f5237949d79e79f85d24b9ae7fa856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 6012 bytes
font_01_sfnt_off00007c21.bin
44dd999dd4d4745301b71d514de4ee6fc1ab9448294a26cfd55c1dce509e6e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 10428 bytes

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