Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7bdd21ba7f7a8e…

MALICIOUS

PDF

35.8 KB Created: 2020-08-18 17:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 571eb6849158eee6bb3812f1eb7e6672 SHA-1: eb6c990f5fb786eed8e9fd0a9fef04b310643ce8 SHA-256: 4a7bdd21ba7f7a8ee22ef2149a4b62b6a504c0956cc9fd598fa5189ec0c87a26
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at ttraff.cc. The document body, though corrupted, contains the string 'formaldehyde 10 safety data sheet' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=formaldehyde+10+safety+data+sheet
    • http://files.ianwarder.com/uploads/1/3/2/6/132681690/zepopogonam.pdf
    • http://files.calgarykarate.net/uploads/1/3/1/4/131406104/lemifi.pdf
    • http://tirore.lanicomediahouse.com/uploads/1/3/1/3/131384281/fce773.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/bejezuzudop.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/luginomesofiradusunaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/bitsat_syllabus_weightage.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/bazixabilepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/bodybuilding_exercises_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/admission_form_format_for_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/minuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/libro_amigas_para_siempre.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/51435107638.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/42862511252.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_off00004e7a.bin
a2331f3e166ccf4114cfd7e9e816c1e27dbf007b438fcd1c063bb3d48647ca73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E7A 5396 bytes
font_01_sfnt_off000060b7.bin
4fe2802040a797c2b2795a816fad9e65c9c798c1391b05df64e057dff6bf925c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 9940 bytes

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