Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a691c4744168ea…

MALICIOUS

PDF

42.1 KB Created: 2020-09-01 14:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b97467eaa14525bb1df4218e0edcd2fe SHA-1: dccfa85e003d8181c9b7b8d8f289ce1a0d1558f9 SHA-256: 21a691c4744168eaa1f1896c2995138a01f3c768f0e4dc061d66aae0090aeee5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also functions as a link farm, embedding numerous external PDF links, many of which point to Shopify domains. The document body, though partially corrupted, contains the same lure text as the malicious URL, suggesting a social engineering attempt to trick users into clicking the link under the guise of a game guide. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ragnarok+mobile+glast+heim+bard+quest+guide
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/26338592745.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/25968233919.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/xubebatitudixuvanar.pdf
    • https://cdn.shopify.com/s/files/1/0449/9701/7768/files/accounting_and_reporting_of_financial_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/judisatifatipugedezaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/fedagewita.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/48117227589.pdf
    • https://cdn.shopify.com/s/files/1/0463/3378/8317/files/prentice_hall_african_american_history.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/89919958143.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/brief_template_schweiz.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_fdd1f96a5cf54e24b41eec7573965446.pdf
    • https://static.usrfiles.com/ugd/0e2875_e08c6d7d238e4e808c314fc4da55eb61.pdf
    • https://static.usrfiles.com/ugd/599026_fb03ad32ed5b469ba008908e9cda16c6.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_off0000658a.bin
2685f988b36caf213216d4673a539bccdb58c96a2d49f493c6660572f8cdd10a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 5576 bytes
font_01_sfnt_off0000784f.bin
2a822263146d413524088f7eecf0af9d37d9668722e7e0b48564a19e606514ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10296 bytes

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