Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa11bfa0e4169ea5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 05:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e006dc054fa23e1f310497fe846d082 SHA-1: 8450aba388a4bc3f5b21a9c29035f306400ac759 SHA-256: aa11bfa0e4169ea5d5b5617748c7db2858928ebb07aa57d350b214984ccdcb85
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/pify?keyword=medical+microbiology+textbook+pdf+download
    • http://files.mayflowerimporters.com/uploads/1/3/1/4/131453177/607d74f0136c34.pdf
    • http://files.mesoamericancalendarstudies.com/uploads/1/3/1/4/131438176/kulozoretaranusaz.pdf
    • http://files.zepedamillan.com/uploads/1/3/0/8/130813781/f21155f5.pdf
    • http://files.blissfulnurturing.com/uploads/1/3/1/8/131872079/judikapigatopame.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/dajifatokofibixutotelose.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/dekaxomijomiluvesap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/vorikuwimimasuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/ubuntu_shut_down_command.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/92994690135.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/laguribimunuvemusupekar.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/piboxetupenijawukuloxitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/46799576923.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/30920909932.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/bizinalapezitofanokiwatog.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_off00004f65.bin
b911b485f5e7cbc375fb3c86666055e64d05defeedd3050cbc565c0baf45b6d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F65 5556 bytes
font_01_sfnt_off0000624f.bin
6c81b32bd86da26f8660807924b2d9a2964b7da9ea8017c4ea47907d72f002c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 9496 bytes
font_02_sfnt_off000082ce.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CE 4324 bytes

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