Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eba2e90ab8f9e6d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-18 18:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e3fb9befdde24c3ae22a80aa7ab8b17 SHA-1: 173875693dfcedda466d4ba325bf4d8246f6b524 SHA-256: 2eba2e90ab8f9e6d5c57f46cd276d1a358ac0a765107e45500d6093a93f0867f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Influenza vaccine nice guidelines', suggesting a lure. The PDF also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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=influenza+vaccine+nice+guidelines
    • http://files.mydaybydaynutrition.com/uploads/1/3/1/3/131398591/9157017.pdf
    • http://files.grayskiddos.com/uploads/1/3/1/4/131453206/7bb70b1a4.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/xepoxaful.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/bijilogavuvip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/kowegefuvekowapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/speed_test_apk_ad_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42386580717.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/the_history_of_benin_kingdom.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/45528688623.pdf
    • https://cdn.shopify.com/s/files/1/0438/5567/5542/files/seriku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/mijexixunisosefe.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_off0000594d.bin
7e8c578cf25c7bb0379c34d5d2730c0df563ff7ba50b95011e153caa693d023e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594D 4832 bytes
font_01_sfnt_off000069cf.bin
a521bd4b663ed3c04af48b042d9a1e95d1e4e5eb43e8c662cb3adaff2c5a3288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CF 10856 bytes
font_02_sfnt_off00008e67.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 4324 bytes

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