Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb8c48d7e7165a6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 20:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48eb11f0f9c39ded4e6f5a8283278659 SHA-1: 24773738b9d4c4b29957369d226d6537d7921de9 SHA-256: ffb8c48d7e7165a6a0e138416c9e2bec9c339533f1414eca98e31a0f23568d5a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector at 'https://ttraff.ru/wix?keyword=phlebotomy+essentials+6th+edition+pdf'. Additionally, it exhibits characteristics of a PDF link farm, containing numerous links to external PDF files, likely for SEO manipulation or to obscure the malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

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=phlebotomy+essentials+6th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/buzujuxozufejebibili.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/7442069361.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/limojarizono.pdf
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/dozimuneb.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/karurezuzixiwubagoxuxukop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/wegijapowuvej.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d237b10b96e43ccbd019bb6ae23e325.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce64934b18b9454eb1cd4b0ec1c38508.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/misoludejazalob.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/new_video_barnaba_washa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/75523885865.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_off000051a4.bin
03247e7fee81309a7094fb73c5adbb3f6ffe30b83f1d094c7c48ba47baf176c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A4 5368 bytes
font_01_sfnt_off000063ba.bin
143f41b9fd0e1bff7dc12665c97710bcdac2f887bf6dd4eabae1d5dd50cd4186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 10136 bytes
font_02_sfnt_off0000862f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 4324 bytes

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