Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bb98a238f31f2e…

MALICIOUS

PDF

45.3 KB Created: 2020-08-20 02:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ff3745cacd4bbc5a1115d366aef5a7 SHA-1: bd4101e2343a6965e191777efc08549e97e681c7 SHA-256: d7bb98a238f31f2e0e30cb6081a94bb3e2a4b70ecc959639a307cf87775658d8
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to `https://ttraff.com/pify?keyword=screen+capture+windows+10`, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a lure to external malicious content. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content.

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.com/pify?keyword=screen+capture+windows+10
    • http://befen.epicfh.com/uploads/1/3/0/8/130873995/4345061.pdf
    • http://lileza.laplayaatthestrand.com/uploads/1/3/2/6/132680981/gumomuraxi.pdf
    • http://vijajojo.orenpizmonylevy.com/uploads/1/3/1/6/131637149/365658.pdf
    • http://files.santabarbarabirthmatters.com/uploads/1/3/0/7/130776601/2401900.pdf
    • http://files.twwrealestate.com/uploads/1/3/0/9/130969837/edc82cb.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/kewefatofobuvepalanumuku.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/wazezutawutar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/32300510867.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/teamviewer_portable_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/vujirozebadizinifopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6779/1765/files/argenta_pivotica.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/sabikasatujet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/69005435444.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/kejakejimogupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/ttw_converted_mods.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000648f.bin
d9d5db8cd2942674d4519bfd500c90bf688c48493d03eb63c55da43d73b6db46		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x648F 11576 bytes
font_00_sfnt_off00005214.bin
415e4c0102fb029baaf7e7ba8328f7bedd0c710e50927e569decbd28468a4632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5214 5424 bytes
font_02_sfnt_off00008546.bin
92eb6c1ff1142c545451cb5b731bfca0a3cf8c1d30c7c2a7d9399cdba372b25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8546 10152 bytes

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