Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa96532bb2a3ef4d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-10 02:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0227076c3a460e3b897d7022223324f6 SHA-1: 1c488881eb1238949cbedf21912b65bb16c7af8e SHA-256: aa96532bb2a3ef4dddacf685cdcc2497c245c86ad793f9bf27c990d21e3b77f4
150 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 pointing to 'https://ttraff.ru/pify?keyword=nomenclatura+de+alcoois+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=nomenclatura+de+alcoois+pdf
    • http://files.ballotball.com/uploads/1/3/2/6/132695454/pazajofarepig-gaverejeri-sagukebis.pdf
    • http://files.firstrentalandsales.com/uploads/1/3/1/4/131407424/a1800c3dbd70.pdf
    • http://files.therealitynews254.com/uploads/1/3/1/3/131398264/9109834.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/13154892253.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/xuxuwalomebevorajapekupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/venom_vs_carnage_comic_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/63096706804.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/61060679612.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/welikexuniluwilaxuloleb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/71880472208.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/44795021633.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/54274207602.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/mollie_tibbetts_autopsy_report.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_off00005f3d.bin
75bc8a04a8bdb8ef9e2a35bd36fa646397b4885892835202adbc7bc73ab28c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 5268 bytes
font_01_sfnt_off00007112.bin
da7107a807a6581af3e7f62c788dfa1979b431a6194b5a672d846e68e43b19bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 10240 bytes

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