Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d2deb29ac9c0d5…

MALICIOUS

PDF

39.6 KB Created: 2020-08-08 23:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dae9cf3b277476b8048ca7c49f425c3 SHA-1: ccae9c32b52d17a6b01b6ea45bb2406d7fded95c SHA-256: 28d2deb29ac9c0d590602d8ccf980bc7e330c32efa525346dd8ef49e67f9786f
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious sites. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, indicating it was likely programmatically generated to host these links.

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.com/pify?keyword=antiinflamasi+ekstrak+daun+binahong+pdf
    • http://ximamex.tothesecondgear.com/uploads/1/3/0/8/130813765/568304.pdf
    • http://files.sarahsheppardsart.com/uploads/1/3/1/1/131163540/desogixoxuseg-timizinoko-nimuxezisikifi-lutop.pdf
    • http://files.jemskpropertyventuresinc.com/uploads/1/3/1/8/131857791/polusonev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/capital_structure_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/18008909809.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/kesalun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/binisefegom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7713/files/27060156709.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/74020781458.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/fazadaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/21077208859.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/fasesetaduvuvifedodivix.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/56207264416.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/nomakogogalejufivasogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4120/files/wastewater_treatment_research_paper.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_off00005bb7.bin
64e1a6ac4cd438023dc6642cb5f59691d3ca81cbc3626d09e0f86180cfff93cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB7 5648 bytes
font_01_sfnt_off00006ec3.bin
ef6bf690a41feec0a4416dee9793bec7d508d2f0c0def01102fa284a3a8d2661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC3 10212 bytes

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