Malicious PDF — malware analysis report

Static analysis result for SHA-256 a304879c661054cd…

MALICIOUS

PDF

35.9 KB Created: 2020-09-17 19:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b554e620dc196c539259b3e59023f01a SHA-1: 12bdcacaea4e707527508004a2e9f3f732e3aeb7 SHA-256: a304879c661054cdff2b37e423c3907b0a705180c64e62a6aaf54d1c50c27404
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. The document body, though partially corrupted, contains a lure related to a 'Kyocera duraforce e6762 manual' and a malicious redirector URL. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure.

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.link/wix?keyword=kyocera+duraforce+e6762+manual
    • http://files.detroitlakesucc.org/uploads/1/3/1/4/131438282/setoka.pdf
    • http://woxowojij.tracytruesdale.org/uploads/1/3/0/7/130775443/564a63f118f.pdf
    • http://sozive.psbproservices.com/uploads/1/3/1/3/131378776/jutufufileje.pdf
    • http://vofal.eatonpropertiesllc.com/uploads/1/3/1/3/131379803/xiruzomadib_kuvuwadumege_pimopif_widugufir.pdf
    • http://files.colneyheathvillagehall.com/uploads/1/3/1/4/131407102/dovujagoxafoxa_wipanegixifepe_nunewipixafile.pdf
    • http://kesedipaz.codyshauling.com/uploads/1/3/1/4/131406455/9367f.pdf
    • https://4f0d5b40-6754-458f-9742-1fa52f37ccf9.filesusr.com/ugd/bbd3cf_ce805882984c4284888f61cd2745ca1c.pdf?index=true
    • https://7cd815a9-aa98-4abe-b819-09363ef7bbf0.filesusr.com/ugd/cf14a4_9beda79a06704bdc966339b8ee4405e5.pdf?index=true
    • https://16249896-6f81-4df0-ac4c-d60ca882b37b.filesusr.com/ugd/2d797c_564aaddba7084dcf8df51686c7048a51.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0447/1308/3036/files/pujimane.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/56172359058.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/27613141003.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/dialogos_sobre_fisica_atomica.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_off00004c3e.bin
8db1881e817665b728009caf2144adeb63b609f20fe3ff05fe3d55667d24f36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3E 5424 bytes
font_01_sfnt_off00005ebb.bin
6b74472df94d7363232a10f6bd0b9cfae0f0e735b2efd2f69dd30b049020d8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 10564 bytes

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