Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b94358a07f7689f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 19:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57b9e10601e3f51dfad2f3b83d47dc68 SHA-1: 6474a487da4135e387e5b3efb6bc36bb12ed2ef0 SHA-256: 8b94358a07f7689f0e532d46452ad6e4cedafaa5b76eb42383543948b97e02a5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a crossword puzzle and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating an attempt to distribute malicious content.

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=melodic+tune+crossword+answer
    • http://files.essentialdance.co.uk/uploads/1/3/1/3/131379113/6b8c67ae.pdf
    • http://files.800steps.com/uploads/1/3/0/8/130813966/9495548.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/gabiburivesepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/fubarasufefomojorijufajul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/ncert_physics_textbook_class_11_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/molazewokenifijakavuxuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5300/files/37615317580.pdf
    • https://cdn.shopify.com/s/files/1/0437/8086/6197/files/47442010444.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6819160869.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/dabamarutonurug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/auscultation_skills_breath_heart_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/9672550522.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/79384294452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b39.bin
24b7d681e7cbf2c4fd74168d5a20bcf1be4ddd82c22c95279722a4ca22a4737b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B39 4912 bytes
font_01_sfnt_off00005c04.bin
e9ada3a168d4950f308ba23605abfc8c56d72039e77697058bbf970e085fafdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C04 10088 bytes
font_02_sfnt_off00007e8b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 4324 bytes

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