Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c7491fb5020aea…

MALICIOUS

PDF

35.8 KB Created: 2020-08-24 07:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46d0c4d8adfb4d68a7af959d26646935 SHA-1: a462b5ed4f83b4d07d6ba3376c5d2edf3adad5ab SHA-256: f7c7491fb5020aeaba40a56aad59c2174d4195bb7cd55972dc6bb36a863f4410
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, pointing to a malicious redirector service. The document body, though heavily obfuscated, contains the primary malicious URL and numerous benign-looking PDF links hosted on Shopify, likely to lend legitimacy. The primary malicious URL is https://ttraff.com/pify?keyword=absolute+value+of+a+complex+number+worksheet, which is a known malicious redirector.

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=absolute+value+of+a+complex+number+worksheet
    • http://files.ldsnest.com/uploads/1/3/2/6/132696233/xenogexajonu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/578394708.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/jajilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/wopavemiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/79075973740.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/organelos_celulares_e_suas_funoes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/introduction_to_managerial_accounting_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/core_du_nord_reportage_photo.pdf
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/bujejopikuzibewinijawan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/benjamin_constant_adolphe_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/ecological_balance_in_nature.pdf
    • https://cdn.shopify.com/s/files/1/0459/2710/4679/files/88120129055.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_off00004c14.bin
82b5eaa4acd37f7a170b95ce05b3896f36abb88a3a07d2d1e4bafb1271cdb44b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C14 5668 bytes
font_01_sfnt_off00005f3f.bin
408983233531cc959de6fbb219affe59788e4ebd631650de73cabb38aa3a1d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 10536 bytes

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