Malicious PDF — malware analysis report

Static analysis result for SHA-256 593ff43bac9deffb…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 05:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77cc7ce10c0e707c1903ac220eb046af SHA-1: 7c8f9d27063a91504b624a06c2ed9774545fc4f5 SHA-256: 593ff43bac9deffb18436aad64b3faa1f87a2043925afd6406cbedfb0538d2e8
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a significant number of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. Specifically, a link to 'ttraff.ru' was flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to financial statements and also embeds the malicious URL, reinforcing the attack pattern.

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/wix?keyword=general+ledger+trial+balance+balance+sheet
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/the_beautiful_names_and_attributes_of_allah_uthaymeen.pdf
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/toro_recycler_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/random_number_1-_6.pdf
    • https://static.usrfiles.com/ugd/54fa57_8035328a5ac94d3cb15e2be1a8e4299c.pdf
    • https://static.usrfiles.com/ugd/5be868_90af5148a4cf4866b0db03f3f74893a9.pdf
    • https://static.usrfiles.com/ugd/6908d7_1dc65df5383c4434adf679abea21073f.pdf
    • https://static.usrfiles.com/ugd/b6edda_1b2b2086f9ef42abab91b6d4c342e585.pdf
    • https://static.usrfiles.com/ugd/c8d394_d5fd4920cee349a5ba9fe260d48acc3b.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/tikutatepoxiferaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/gram_panchayat_action_plan_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8487/files/a_and_an_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/21937892734.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4567/files/42137284727.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/51242902169.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/28616547472.pdf
    • https://cdn.shopify.com/s/files/1/0438/7520/5288/files/62586887430.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_off00006559.bin
d267197e3c69be0df06426de951ea759b10949249cdc62cb62b82aaa2d2d5fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 5372 bytes
font_01_sfnt_off00007791.bin
dd5fa60329e0b48205e6bebea742b2d5bda4743f9f4319648c664582aa5e6ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7791 10120 bytes

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