Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1dd8c800cd1468f…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 02:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 576007557a190acbc14276e1f3ee47c8 SHA-1: 80b61d2c5b5a28e13be2ac2c71c9ed1a7ee69a5f SHA-256: c1dd8c800cd1468f69a88cb6a13821bb807a2449c5fc8881b902b14e4fb94d25
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=cancer+screening+guidelines+for+firefighters', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to Shopify-hosted PDFs, suggesting a tactic to distribute content or manipulate search engine results.

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=cancer+screening+guidelines+for+firefighters
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/kujizikujanagexij.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/jim_pitman_probability.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/44082283569.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6e368138d1145d0b65419766879260b.pdf
    • https://static.usrfiles.com/ugd/9e41f0_382a96bb502c4f79adc6d17f5e62d9ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_d422ec1068354474a274f0a8a3d3554d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ca9ee3b85aa4b28a40204dbd0cb6a60.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/akashic_records_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/vshare_ios_jailbreak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/marulav.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/gambar_animasi_lucu_kartun.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_fe8138d5168f486ca65cb38a4f7a0e86.pdf
    • https://static.usrfiles.com/ugd/b8c837_0af91e1b133d42008a5626b11f3bb88d.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_off00006870.bin
b8691db00ffe5e886ae364e2b42243c0b2f11132844a2a9181f1c5a881a7aefb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 5188 bytes
font_01_sfnt_off00007a07.bin
becd9a4e053cd0457dc87d4606e9adde70ec22c047d98755908c2ec4a8ea3baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A07 10936 bytes

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