Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ad3b83ffd5d316…

MALICIOUS

PDF

92.3 KB Created: 2020-08-31 04:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4a7d317febf2c74f4c3d96132dc73a SHA-1: 4b8f9585ac85b47e5e033981ad34c2cd30f6003f SHA-256: 34ad3b83ffd5d31604b1e191830f1c73b375b9117232fe0d91f0a13b4984121a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, two of which are to Shopify. The primary malicious URL identified is https://ttraff.ru/wix?keyword=topix+deleon+tx. The document body is heavily obfuscated and appears to contain embedded URLs, further supporting the malicious redirector pattern.

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.ru/wix?keyword=topix+deleon+tx
    • https://cdn.shopify.com/s/files/1/0430/9847/2605/files/diploma_in_ifrs_acca_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/36134670142.pdf
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/85785989265.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9509/files/networking_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/meilleur_navigateur_web_android_tv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/zadekoximukoloxiregizuv.pdf
    • https://static.usrfiles.com/ugd/c6ac46_f654627eb7aa4b75adadae13a8728cd4.pdf
    • https://static.usrfiles.com/ugd/b0b521_263e29ab594c44ba814987f7694d1c02.pdf
    • https://static.usrfiles.com/ugd/b3bc21_f580a983974647ed8356157164ba1fbf.pdf
    • https://static.usrfiles.com/ugd/696117_7161e744ffcd48deabc1e94b64e7dc65.pdf
    • https://static.usrfiles.com/ugd/e33828_4b5e2bb1da4d411583f98c23c35dcc4b.pdf
    • https://cdn.shopify.com/s/files/1/0460/2514/6527/files/kasifiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/visotojusu.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_off00012387.bin
ad7881413b273b37124872875d8681da0efa9edc07cbeea7c1f4a2d64afd3f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12387 4488 bytes
font_01_sfnt_off000132dd.bin
85d91f7befdc82ea2c2b8fe1ef3b4dc477cf3a02aa7b73a7f9c3381e49ff9745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132DD 15592 bytes

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