Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4985bc42a7d475…

MALICIOUS

PDF

74.5 KB Created: 2020-08-02 18:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4783b1ec56a1e0acd91681928974a8c3 SHA-1: 4c9a847fd02b2b4db08544785eb2bb19c1c42d63 SHA-256: 9e4985bc42a7d4756cd6c287db4667fc0bece50ff185394dfef07200c04a3dce
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=tao+te+ching+pdf'. The document body, though heavily obfuscated, contains text related to 'Tao te ching pdf' and mentions the authoring application, likely a lure to disguise the malicious intent of redirecting users to potentially harmful sites.

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/pify?keyword=tao+te+ching+pdf
    • http://files.viennaartstudio.com/uploads/1/3/1/4/131437982/5885064.pdf
    • http://files.bonuselkantler.com/uploads/1/3/0/9/130969740/musuxesu-tajirilirexom-wifulobubi-reratesorutoz.pdf
    • http://files.karensteward.com/uploads/1/3/1/4/131408415/tulurobo-zululifum.pdf
    • http://files.movingwiththemilitary.tv/uploads/1/3/1/0/131070872/6792719.pdf
    • http://gevunug.west-pro-installations.com/uploads/1/3/1/0/131070420/vadaxukibolejebud.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/nilaxuxeloxipilina.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/nuxuzubepokizomowemutejob.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/ragijurevibobinejodos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/wolugazuwimazod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/vemukotononimavig.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/zuwebigatuwiwumiminejiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/gizakelawikexem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7269/files/4680849024.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/28537412818.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/fire_emoji_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/78751376563.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/likamabununanezowarijutiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/nodepewomelazonazukurufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/netekagore.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_off0000c614.bin
5f0e64894c7bfedf325685a006aa080dade58c0fe8f12365dec8e3e58815c640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC614 6628 bytes
font_01_sfnt_off0000dc2c.bin
4b647f24bbe542fc07dc78d87dfae4c3c0f5eca44f30bcb131a8b12dadeabe1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 5060 bytes
font_02_sfnt_off0000ed69.bin
8d7b64888fda7035dd681dab2aa2151564d68daea040c839bdb0af188d1b3c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 15584 bytes

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