Malicious PDF — malware analysis report

Static analysis result for SHA-256 430e8174d6fe825f…

MALICIOUS

PDF

42.2 KB Created: 2020-09-17 00:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d18c88aaa1068d62565f5902f43bd9 SHA-1: b1f5060389af9546b04fa4fdd486e67c98e60ecb SHA-256: 430e8174d6fe825f1a5890340adb301bf134265d486713d5eb1713053541ecfb
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 a redirector service. One such link, 'https://ttraff.link/wix?keyword=bowflex+sport+exercise+manual', is directly presented in the document body, suggesting a lure to a malicious site. The PDF also hosts a link farm, indicating a potential SEO poisoning or traffic generation scheme. The ML classifier strongly supports the malicious nature of this PDF.

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=bowflex+sport+exercise+manual
    • http://files.cindyhuntermorgan.com/uploads/1/3/0/7/130740256/zividejewumevez_duduvurikasup_tebetopaxogomo.pdf
    • http://files.revivalfamily.ca/uploads/1/3/1/6/131636890/rokin.pdf
    • http://balow.cheyennepuga.com/uploads/1/3/2/8/132814007/dojilimunu.pdf
    • http://vipuk.jtdudrow.com/uploads/1/3/1/3/131379538/zukoziwo_xidewaz.pdf
    • http://vededem.janiktremblayhomeopathie.com/uploads/1/3/2/6/132682787/8996288.pdf
    • https://591b81b1-2363-469f-8c50-d5ef744934d0.filesusr.com/ugd/5aec95_2b000b3e8d0b4690909efd06899b2f4e.pdf?index=true
    • https://5e33105e-73b3-4e9e-8077-89a03ddb1637.filesusr.com/ugd/ccf397_d0dcf8cc2db7486994edfc49edf74582.pdf?index=true
    • https://d63270ad-0122-408a-907a-fb41ca4bae62.filesusr.com/ugd/c5d40f_8d613205b5d8411080629113fe485273.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/gramsci_prison_notebooks.pdf
    • https://0fb0ff3b-2679-4868-a7b9-74f3c8ed23fb.filesusr.com/ugd/4bb894_9bd3936dca2443f5837b2cbb11b4f63f.pdf?index=true
    • https://a6cfe44e-a6eb-4efe-91e9-8818fffa49e4.filesusr.com/ugd/277b62_d1633efa0b24476ea47e952cb2500e8b.pdf?index=true
    • https://bbf32615-70da-4585-98fc-05765fb3b9b5.filesusr.com/ugd/9117e0_95c77f06d5674b2faa0cc0567ebdb360.pdf?index=true
    • 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_off0000677d.bin
570b2126aa2515cb1ed33a26c9807a7c549e388f8069641140fc75c204142301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677D 5372 bytes
font_01_sfnt_off000079c6.bin
2762a428ea308b44021ec5c558de85e2c82d6dfa0a01259f8ca1b265c4be8042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 10024 bytes

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