Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfab5e222b805b56…

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 21:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ccd4e3993a24a1133ca28de5da3a69 SHA-1: bded75e72736341ff2babcfd457511bbdc47735b SHA-256: cfab5e222b805b5623776e35b078ffd35fb1aa40795b023d4dcb7b7a93f8b6a5
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector link, indicating an attempt to lure users to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/wix?keyword=consumer+math+workbook, which is likely used to redirect users to a further malicious destination. The document body, though heavily obfuscated, contains references to a 'consumer math workbook' and the authoring application 'wkhtmltopdf', suggesting a social engineering pretext.

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/wix?keyword=consumer+math+workbook
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/57211268239.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/17724918392.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/linkedin_summary_template.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/southwest_airlines_2020_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/53383339958.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/87907045567.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/zidenikajijud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/85838842650.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6774/files/alopecia_areata_bad.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/hdfc_mutual_fund_common_transaction_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bokowolexom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/biarritz_olympique_rugby_centre_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/canon_eos_30d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/44596406758.pdf
    • https://cdn.shopify.com/s/files/1/0439/2802/7304/files/20005618934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.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_off00004d56.bin
bb71ceb79debb35cec121a3f14184d84fac47c01e6dbcecf46991365593de4bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D56 5092 bytes
font_01_sfnt_off00005e82.bin
bd473209d7655916431d15e851689e4f1f2501617ac63b7734b61de8b464f2f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 10120 bytes

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