Malicious PDF — malware analysis report

Static analysis result for SHA-256 b671d118555cca21…

MALICIOUS

PDF

44.8 KB Created: 2020-08-29 04:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f42f4158d93de24a5812c23fd4cb929 SHA-1: 583dd4675b2e5b6f985be6d64d4773883c235390 SHA-256: b671d118555cca2104057d4e4e48d5938b9875bde6c819fe611b8ceb390b2f8d
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 at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a likely attempt to lure users to malicious infrastructure through a link farm, potentially for phishing or malware delivery.

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=phim+m%25E1%25BB%2599t+ng%25C3%25A0y+kh%25C3%25B4ng+c%25C3%25B3+em+t%25E1%25BA%25ADp+cu%25E1%25BB%2591i
    • https://static.usrfiles.com/ugd/b8c837_029771cc94794afeb1f2d724146955ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_78332af507ad48bea4df53ee23f6d7e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_236f357a6a844886b6b9d1d0f9d061e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_de645057731a4d4885797e5ec200911f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d452f6dc57ff4df78bf6ceb0bc1b4b2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc995817c58b4ba49f064593be302df5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f1c85de66dd4687b694c5f26e3a0ccd.pdf
    • https://static.usrfiles.com/ugd/b8c837_bce09e6929ee4223b55d3ecf40c1e01b.pdf
    • https://static.usrfiles.com/ugd/b8c837_049c45f543bd4e459f0f7d0cea04feb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7c9de12e5e34ddb9f71395a7b25e11b.pdf
    • https://static.usrfiles.com/ugd/b8c837_63bd3057394d49dcba36ab75cfca107e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7295b7dca1ec4c1ea5e646ec88bd6e5a.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/zimurabekevijenul.pdf
    • https://cdn.shopify.com/s/files/1/0462/4642/8823/files/werikovazeroguti.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_off0000622d.bin
99fbda9bd85bb4b89728713f55d7e52849a579de924b134742c7e2dfc27d5bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 6088 bytes
font_01_sfnt_off000074f7.bin
63530221c3562c2d6fc4b815ec262d834ed8a7d964da2ef77a7a021c41d1b2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 21700 bytes

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