Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788d51352831e7d…

MALICIOUS

PDF

51.5 KB Created: 2020-07-28 17:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf97c84864c1ac7a66fa45eae65f0dee SHA-1: d4a246be8c1dc849d8dbde4fe98fe793ba583a89 SHA-256: 4788d51352831e7dbed78fdf03a5caacc9cd8379c51da7cba7250bdc602b940c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous links, with one heuristic specifically identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to legal practice manuals, combined with a call-to-action phrase. The presence of a link farm further indicates an attempt to distribute malicious content or traffic.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=company+law+practice+manual
    • http://files.kpcohuntsville.org/uploads/1/3/1/0/131070207/vexavaminonikej-zedumi-tetogipiw.pdf
    • http://files.happy-cow-bakery.com/uploads/1/3/1/4/131438419/5028588.pdf
    • http://files.huntersvillelawyer.com/uploads/1/3/1/3/131379183/tosuz.pdf
    • http://files.heidibarongodoff.com/uploads/1/3/0/9/130969659/setolusod.pdf
    • http://files.malvoncollies.com/uploads/1/3/1/4/131408581/xibapijudunewij.pdf
    • http://files.huntersvillelawyer.com/uploads/1/3/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/48209741270.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/77868035839.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/mezakosanojiterumomig.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/27213373637.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/moviwakituda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/ruronel.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/puwifonadafawam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/61394353572.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/guvedireto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/20392927090.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/poxetapidosipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/dejax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/94756627696.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
font_00_sfnt_off00007c4b.bin
669d7fef14f2a2e6c88aaee7246439d6a59a80c619f3f492993135df0a514f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4B 5000 bytes
font_01_sfnt_off00008d3e.bin
0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3E 6148 bytes
font_02_sfnt_off00009d1e.bin
604f2a231ccffcddae37c9a2688791e98f556c79f99547b85b2b8a3f5c8c5bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1E 10404 bytes

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