Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d677014cf05c625…

MALICIOUS

PDF

44.3 KB Created: 2020-09-21 00:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10febfc7abb3bbafa9a90cd46e747bb5 SHA-1: acaf6f8bc8bbe21471e6a95a560a79312c4fa05a SHA-256: 3d677014cf05c625ea971aebeba9661975223a0e1a5847a4a25f416352146b02
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body itself is heavily obfuscated but contains the primary malicious URL, suggesting the document's purpose is to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=xv+2020+roland
    • http://files.bluelotusbeadwork.com/uploads/1/3/2/8/132816195/nemidi_zovikiwidezor_fizoxa_talejakif.pdf
    • http://files.zion-top.org/uploads/1/3/0/8/130874526/kuxofekujev.pdf
    • http://files.greycaseyfry.com/uploads/1/3/0/7/130738620/025b6a8e.pdf
    • https://7df6ab9f-cea3-4744-b0bc-b722f09c06f7.filesusr.com/ugd/ee6770_a42ba8798f294e5e847d5941ef0b46ea.pdf?index=true
    • https://c45c3504-5c53-4702-91ea-57227ff3e6e7.filesusr.com/ugd/957c7b_00788250cb324805918ccfdb621d6625.pdf?index=true
    • https://078a0d80-cdc3-4343-b119-6b3e172004e4.filesusr.com/ugd/5e8de6_0d65841d041f4550921bb44146704023.pdf?index=true
    • https://f2c48602-450e-4550-a923-626bfb06ff75.filesusr.com/ugd/a8ca0f_1500bcb430e6489b8058a4fa000b6166.pdf?index=true
    • https://baa26711-e0df-40f2-a0be-53ba9d05fb96.filesusr.com/ugd/70e7d4_ee0af766af1549059c1b6360a8893752.pdf?index=true
    • https://22e04f4e-5751-4900-a958-8ea9f535742a.filesusr.com/ugd/694d5d_c3f7ce95765345f6a124c45b309b3655.pdf?index=true
    • https://74f3c69d-c401-42f9-b54f-27ee1ce9925b.filesusr.com/ugd/197ed4_79415b800ff64ce1b81932cdfe6db293.pdf?index=true
    • https://f86c3f35-5d54-4d09-8259-7532aab5b568.filesusr.com/ugd/06497e_7388877d0c4249e1b27d02cb87585b64.pdf?index=true
    • https://6e17d033-39f6-4624-9ceb-d4f5ee151ff0.filesusr.com/ugd/9cfd0a_4212608d593c4bf59a268597f4e703d5.pdf?index=true
    • https://db938a4f-449b-430a-807d-50bb745f34f3.filesusr.com/ugd/3f1130_eec5a794fec04daea39a7d54f90f065b.pdf?index=true
    • https://af22419c-9885-4d03-9bec-01ab2ae95a46.filesusr.com/ugd/93c935_c36d999b5d44479a9d2098500131a24e.pdf?index=true
    • 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_off000070a3.bin
559352873b4c834e93c0ea3b0a44174a6a0dd3d272e7a5102a624c835ac98daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 4952 bytes
font_01_sfnt_off0000818b.bin
8222cb347563b8afbc689ebf3c1016f50f9c8a877c055263dedb70eb35199c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818B 10408 bytes

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