Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72bd815b4213a47…

MALICIOUS

PDF

63.4 KB Created: 2020-10-15 11:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5fee0ce5f4086f8e00a1d76817e107a SHA-1: 898548e42b18a722ce746a364064fde12650e945 SHA-256: a72bd815b4213a47e824fbbc28cb8df674b7dccfade27e9f58490ce34498c1e9
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://ttraff.link/pify?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2583%25D8%25AA%25D8%25A8+%25D8%25AF%25D9%258A%25D9%2586%25D9%258A%25D8%25A9+pdf+%25D9%2585%25D8%25AC%25D8%25A7%25D9%2586%25D8%25A7, is identified as a malicious redirector. The document body is heavily obfuscated and contains binary data, but the presence of these links is the primary indicator of malicious intent.

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.link/pify?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2583%25D8%25AA%25D8%25A8+%25D8%25AF%25D9%258A%25D9%2586%25D9%258A%25D8%25A9+pdf+%25D9%2585%25D8%25AC%25D8%25A7%25D9%2586%25D8%25A7
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f87b4e7967d0.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8708809192a.pdf
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f8766013b218.pdf
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/6169007.pdf
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/safiregulo-nosazeniriwip.pdf
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/4464003.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86fefa90cbb.pdf
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8710e848db6.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/pom_for_windows_version_5_download.pdf
    • https://cdn.shopify.com/s/files/1/0493/5807/8118/files/negaveral.pdf
    • https://cdn.shopify.com/s/files/1/0499/2480/0673/files/titarupudiwilefid.pdf
    • https://cdn.shopify.com/s/files/1/0497/9916/8163/files/7798991763.pdf
    • https://uploads.strikinglycdn.com/files/9bed064c-e9e2-40ca-be01-9fcdb4df38ba/554464047.pdf
    • https://uploads.strikinglycdn.com/files/8e4079df-f68c-411a-a194-8b8103b8b135/vizibefubiz.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000abd6.bin
2816c97d8d7c012636973093502f691dbd118a2ba2cd55ab2b4dc7eb1d38b616		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xABD6 29116 bytes
font_00_sfnt_off00005e65.bin
dd45b89e20aaf837f18a0890cc68b58564142635624f982355f05ef41955c18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E65 3748 bytes
font_01_sfnt_off00006aff.bin
d2fa21195763eaa126c916e1e2fffc836270ea41fb04e1c95f7e4f6b620ae598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFF 17884 bytes
font_02_sfnt_off00008572.bin
1024c7767d7e956ec6cb573d4b6796cf4a5288d2bca1f747c2bdb526200cd734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 11960 bytes
font_04_sfnt_off0000df6c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 4324 bytes

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